V. Choose the correct option in brackets to complete each sentence.  (Chọn đáp án đúng trong ngoặc để hoàn thành mỗi câu.) 1. Linh (might/ must) be there on time, I guess. 2. I (might not/ cannot) attend our English contest next Saturday, but I’ll try my best. 3. He practises running every morning. I think he (has to/ might) become a professional runner one day. 4. Her family (should/ might) move to the city, but I’m still not sure. 5. We (might/ must) find aliens on Earth one day, but I’m sure they will not speak our language.