Mr. Smith must know a lot about Chinese history.—________. He has studied it for years.

The ______ of living areas makes wild animals becomefewer than before

ch pepper did you put in the soup–I’m sorry to say, ____. I forget.

（题文）He had his camera ready ____________ he saw something that would make a good picture.

We most prefer to say yes to the ______ of someone we know and like.