Some of the children _____ under the big tree.
A. are singing
B. are sing
D. is singing
—Could you go to buy some salt for me, Vince?
—I'd love to, Mum, but I ________ my homework.
C. am doing
D. was doing
1. Frank ______ (bring) some interesting books to me.
2. Where ______ Lisa ______ (come) from?
3. His uncle ______ (learn) French now.
4. The little boy is very ______ (fun).
5. I ______ (think) how to answer the question.
—It's 5:00 p.m. I think his family ______ dinner.
—I think so.
A. is have
B. are having