1.1.Before i (watch)........,I (do). my homework . 2. He (open ).....the door, (enter).......the room ,and (break).....something. 3.The earthquake (happen).......... while we(sleep)..... 4.He (write ) ......the textbook ,when we(have) a headache 5.We (return)......from New York by train. 6.If you visit me tomomorrow ,I (give)..you a small present . 7.They (look).. at the pictures when I (break)..... the glass. 8.We (study)... when she (call)...... her children . 9.He told me he (not/eat)...... such kind of food before . 10.Tomorrow i (leave)........ for home. 11.I think he (come )...... tomorrow . 12.Who is this lady ? She (move)  ...into no 4 last month . 13.I (wait)....... for ages when finally the bus arrived . 14.they (prepare)....the Christmas dinner today. 15.She says that she (live). in the coutry when she (be) ...... a child.

1.1.Before I (watch)....watched...., I (do).had done my homework.

2. He (open )...opened..the door, (enter)....entered...the room, and (break)...broke..something.

3.The earthquake (happen).....happened..... while we(sleep)...were sleeping.

4.He (write ) ...was writing...the textbook when we(have) were having a headache

5.We (return)...returned...from New York by train.

6.If you visit me tomorrow, I (give). will give.you a small present.

7.They (look).were looking. at the pictures when I (break)..broke... the glass.

8.We (study). were studying.. when she (call)...called... her children.

9.He told me he (not/eat)..not to eat.... such kind of food before.

10.Tomorrow I (leave)....will leave.... for home.

11.I think he (come )...will come... tomorrow.

12.Who is this lady? She (move).moved..into no 4 last month.

13.I (wait)...have waited.... for ages when finally the bus arrived.

14.they (prepare)..are preparing..the Christmas dinner today.

15.She says that she (live)lived. in the country when she (be) ...was... a child.