2019年mpacc考试英语真题——连词349

{01}— You look unhappy, my son?
— I"m wondering how long it"ll be ________ we come to China again.
A.since  
B.when
C.before  
D.after
解析：
本题选C。

{02}In my opinion, what matters is not how much a present costs, _____what it means to you.
A.however
B.nor
C.either
D.but
解析：
本题选D。