It’s our duty to protect the environment. So don’t waste paper everywhere.
— do you visit your grandpa? —Twice a week.
There are many important things on the blackboard. The teacher asks us to ______.
Please stop to have a rest. I think, to teenagers, health is as __________ as their study.
Of all the girls, Jenny was ______ because she got the first prize.
What does your brother want to be when he__________?