Ann ,is this pen ______?----No, it isn’t. It’s_______.
We will go climbing as soon as the rain ________.
I forgot to take the map. So I had difficulty ______the way. We had to ask the policeman for help.
She lives in a house,but she never feels .
Not only he but also his friend________to Yunnan every summer.
The new treatments________by Norman Bethune helped a number of soldiers.