679.Did you have any trouble ____ the post office?

A.to have found

B.with finding

C.to find

D.in finding

680.Some people say that we live ____ the age of computers.

A.in

B.at

C.with

D.for

679.答案是D;

考查习惯搭配:have trouble/difficulty(in)doing sth./with sth.干某事有困难。注意其中difficulty和trouble均为不可数名词。

680.答案是A;

live in the age of computers生活在电脑时代。