1、You will want two trees about ten feet apart, from ________to suspend your tent.

　　A.there　　B.then　　C.which　　D.where

　　2、That was so serious a matter that I had no choice but ______the police.

　　A.called in　　B.calling in　　C.call in　　D.to call in

　　3、Americans eat ________as they actually need every day.

　　A.twice as much protein　　B.protein twice as much

　　C.twice protein as much　　D.protein as twice much

　参考答案：

　　1、C　2、D　3、A