2019年mpa考试英语真题——介词和介词短语2854

{01}All his attempts to unlock the door were    , because he was using the wrong key. A.in return B.in vain C.in doubt D.in time 解析：考查短语辨析。in return 作为回报，in vain 白费力，白辛苦，in doubt 怀疑的，in time 及时，句意：打开这个门的所有努力白费了，因为他用错了钥匙。所以选B。
本题选B。
{02}—How do you go to school?
—By walking. It’s ______ walking distance of my home. A.of B.by C.during D.within 解析：考察介词.of……的；by通过某种方式；during在……期间；within在……之内。句意：你怎样去上学？——步行。路程在我家的步行距离之内。故选D
本题选D。