Tom asked ___ to ride to the museum with him, Sally.–OK. But we’d better go by bus. ____ will take one and a half hours by bike.

InthefleamarketlastweekIsoldmycomputer______1000yuan[ ]

It is ______ to spend money in preventing illnesses by promoting healthy living rather than spending it trying to make people ______ after they are ill.

This is the woman _____ works in the shop.

The _____ population has caused many serious problems.