I always make mistakes in my math exams. What shouldI do –I think you should be _________.

Would you like to do some shopping with us after school — __________ . But I have too much work to do.

Mike is my friend. I often help _____ with his Chinese.

In my opinion，everyone should________ their bad behaviour in public places.—I agree with you.

This is the first American film _______ I have ever seen.