2019年mpacc考试英语真题——介词和介词短语1684

{01}Because of too many differences between the two sides,  a lot of questions are still left ________.
A in the air      B on the air         C by the air      D through the air
解析：本题考查词组搭配。In the air 意思是“（计划等）未决定的”；on the air 意思是“在广播中”；C、D不正确。根据句意“很多问题还未解决”，故A正确。
本题选A。

{02}His father was pleased ___ his mark in the final exam.

A.at

B.with

C.to

D.for

解析：be pleased with sth.意思是：对某事感到满意/高兴。
本题选B。