2019年mpacc考试英语真题——介词和介词短语2177

{01}As is known to all , theory is based on practice and _______ serves practice.

A.by chance

B.by turn

C.in return

D.in turn

解析：短语辨析。by chance偶然；by turn轮流；in return作为回报；in turn轮流，依次，转而，反过来。句意：众所周知，理论以实践为基础，反过来又应用于实践。所以选D。
本题选D。
{02}We are very annoyed ______ his mistake, because we have emphasized this for several times.   

A.at/about

B.with

C.on

D.to

解析：考查短语：be annoyed at/about 对什么感到生气，句意：我们对他的错误非常生气，因为我们已经强调了好几次。所以选A。
本题选A。