II. Complete the sentences with the correct form of the verbs. 1. My sister and I  ...................... (go) shopping tomorrow. Do you want to join us?   2. Harry  ...................... (practice) the piano on Fridays.   3. What time  ...................... the festival  ...................... (open)?   4. I like  ...................... (read) comic books.   5. My house  ...................... (not have) a big yard.   6. My dad usually  ...................... (do) the shopping on the weekend.   7. I like ...................... (chat) to my friends and my cousins.   8. My dad ...................... (cook)  breakfast for my family every day. 9. Today we ...................... (wear) shorts because it’s hot. 10. I ...................... (listen) to music now.   III. Complete the sentences with the correct form of the words. 1. There are many ............................. landscapes in my village.                                           (beauty)  2. Living in a town is  ............................. from living in a big city.                                       (differ)  3. Is that blue bag yours, Mike? – No, it isn’t. ........................ is brown.                               (I)   4. What do you do in  ........................  P.E. class?                                                                 (you)  5. Today is a  ........................  day. We can play badminton in the garden.                           (love)  6. She is pretty, with long hair and a  ........................ smile.                                                 (friend)  7. Simon is very ........................ when his friends have problems with their homework.     (help)  8. Turkey and mashed potatoes are ........................ food on Thanksgiving Day.                 (tradition)  9. Would you like to go to the ........................... of our drama group this evening?             (perform)  10. During Tết, children wear new clothes and receive  ........................ money.                (luck)  giúp mi bài ni với 

Phương pháp làm bài này là điền đúng dạng động từ hoặc từ ngữ phù hợp vào chỗ trống trong câu.

1. My sister and I will go shopping tomorrow. Do you want to join us?
2. Harry practices the piano on Fridays.
3. What time does the festival open?
4. I like reading comic books.
5. My house does not have a big yard.
6. My dad usually does the shopping on the weekend.
7. I like chatting to my friends and my cousins.
8. My dad cooks breakfast for my family every day.
9. Today we are wearing shorts because it's hot.
10. I am listening to music now.

1. There are many beautiful landscapes in my village.
2. Living in a town is different from living in a big city.
3. Is that blue bag yours, Mike? - No, it isn't. Mine is brown.
4. What do you do in your P.E. class?
5. Today is a lovely day. We can play badminton in the garden.
6. She is pretty, with long hair and a friendly smile.
7. Simon is very helpful when his friends have problems with their homework.
8. Turkey and mashed potatoes are traditional food on Thanksgiving Day.
9. Would you like to go to the performance of our drama group this evening?
10. During Tết, children wear new clothes and receive lucky money.

Có nhiều cách làm khác nhau tùy thuộc vào từ vựng và ngữ pháp mà học sinh đã học.

1. Are you interested in joining my sister and me for shopping tomorrow?
2. Does Harry practice the piano on Fridays?
3. When does the festival open?
4. Do you like reading comic books?
5. Does my house have a big yard?
6. Who usually does the shopping on the weekend?
7. What do you like to do? I like chatting with my friends and cousins.
8. Does my dad cook breakfast for my family every day?
9. Why are we wearing shorts today? Because it's hot.
10. What are you doing now? I am listening to music.

1. My sister and I are going shopping tomorrow. Do you want to join us?
2. Harry practices the piano on Fridays.
3. What time does the festival open?
4. I like reading comic books.
5. My house does not have a big yard.
6. My dad usually does the shopping on the weekend.
7. I like chatting to my friends and my cousins.
8. My dad cooks breakfast for my family every day.
9. Today we are wearing shorts because it's hot.
10. I am listening to music now.

Để giải câu hỏi về vận tốc truyền âm trong nước, chúng ta có thể làm như sau:

Phương pháp giải:
- Để tìm vận tốc truyền âm trong nước, cần biết công thức tính vận tốc: v = s/t.
- Để tính s, ta cần biết khoảng cách mà âm thanh đi qua trong nước.
- Để tính t, ta cần biết thời gian mà âm thanh đi qua khoảng cách đó.

Câu trả lời:
Vận tốc truyền âm trong nước tùy thuộc vào nhiều yếu tố như độ nhớt, nhiệt độ, áp suất, và cường độ âm thanh. Tuy nhiên, vận tốc truyền âm trong nước thông thường khoảng 1*** m/s, tương đương khoảng 5*** km/h.