I am afraid he has some difficulty the chemistry problem．
A. to work on B. to work out
C. in working on D. in working out
— What did he say? — He asked me with my pet.
A. if I am playing B. where was I playing
C. whether I was playing D. that if I was playing
you have problems， you can call me.
A. Whenever B. Until C. Whatever D. While
—What do you think of the programme Running Man?
—I think it is very fun， and it is worth .
A. watch B. watches C. watching D. to watch
What colour do you think you feel calm?
A. making B. makes C. to make D. make
I suggest a party to celebrate his 80th birthday.
A. to have B. have
C. having D. you to have
