(2014·衡水中学月考)You________scold such a pupil who always keeps silent so seriously that you________hurt him.

It’s raining! When did it start — I don’t know exactly. In fact, it _________ all this afternoon.

His sistersince she left home in 1998.

________ do you fly to New York on business– Nearly once every two months.

When you stand on the top of the mountain and overlook the surrounding scenery，you’ll find it is________to climb it up with effort