2019年mpacc考试英语真题——介词和介词短语2698

{01} —Would you like some more chicken?
—No, thanks. I am _________ a diet and I’m trying to _________ weight.

A.on; lose

B.on; put on

C.in; have

D.in; lose

解析：略
本题选A。

{02}He worked hard and achieved what he set out to do, but ________ what he had owned, including his health and his marriage.

A.at the mercy of	B.at the risk of
C.at the cost of	D.at the service of

解析：略
本题选C。