2019年mpacc考试英语真题——介词和介词短语2246

{01} —More than fifty students competed _______each other in the composition competition.
—But they could only compete _______three medals.

A.in; for

B.against; with

C.against; on

D.with; for

解析：考查介词。句中compete in在……方面竞争；compete for为……而竞争。句意——超过50名学生在作文竞赛中彼此竞争。——但他们只争夺3块奖牌。
本题选A。
{02}A clean environment can help the city bid for the Olympics, which        will promote its economic development.

A.in nature

B.in return

C.in turn

D.in fact

解析：略
本题选B。