—What did the teacher say just now?--He asked the students_____.
_____ to improve English?
—Which sweater do you prefer, the yellow one or the pink one? —______. I like a light blue one.
I don’t know if he_________here. If he ___________tomorrow, I will tell you.
The world’s population is getting larger and larger, so scientists are trying to ______ new ways to solve the food shortage.
He finds watching movies ______because the people speak too quickly.