2019年mpacc考试英语真题——介词和介词短语1907

{01}He is seriously ill. His doctor said he is ___ of death.

A.at the edge

B.on the edge

C.at edge

D.on edge

解析：略
本题选B。
{02} Don’t be afraid ___ mistakes when you speak English.

A.to make

B.of making

C.that make

D.making

解析：略
本题选B。
{03}Mary dropped in ____ Mr Smith, but he  wasn" t at home, so she went to drop in ____ Mr Smith"s office.          

A.on, on

B.at, at

C.on. at

D.at. on

解析：略
本题选C。