Yao Ming is 2.26 metres tall. It’s very tofind a bed big enough for him.A．easy

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

The company is atarting a new advertising campaign to ______new custumers to its stores.

We have to ______ everything question indetail ______ we take action.

Milk will turn sour soon on hot days ______ it is stored in the refrigerator．