Will you read me a story, Mummy?—OK. You ________ have one if you go to bed as soon as possible.

下列各句中，表达得体的一项是

We have done a lot to make our city cleaner, but it’s still not enough.– So we should do ________ to improve it.

25 John, _______ money is no problem, still leads a simple life

Tom works hard at English.—____, and _____.