2019年mpacc考试英语真题——连词829

{01}.Why did you take a taxi____you could come here by bus?

A.while

B.unless

C.when

D.until

解析：略
本题选C。
{02}30. When he was only thirty years old, he had already experienced______most people only experience when they are much older.

A.what

B.which

C.who

D.When

解析：略
本题选A。
{03 All plants need air_____ they need water.

A.like

B.as if

C.as

D.so

解析：略
本题选C。