The rapid economic growth that _____ in China in recent years has resulted in great improvements in living conditions for many Chinese.

What about playing football this afternoon –I prefer ________at home to ______out.It’s too hot outside .

So that explains why you caught a cold. You _______out last night without a coat.

The boys are still playing basketball happilyon the court ______ it is raining heavily

Do you often study with a group— Yes. I find ______ really helpful to study that way.