I’m afraid I’m not ____ to help with the show, for I am fully occupied with my own project．

______ over and over again, but he stillcouldn’t understand.

The world’s population is getting larger and larger,so scientists are trying to _______ new ways to solve the food problem.

Our class will become ________ quieter if we make ________ noise in it.

We won three games and lost two______, I’d say it was a successful tournament[ ]