2019年mpa考试英语真题——介词和介词短语1184

{01}_____ his return from Europe, he set to work on the project.
A.As
B.At
C.Upon
D.For
解析：
本题选C。

{02}Soon, his warm, inviting smile put me _____, and we spent the next two hours talking casually.
A.at attention
B.at ease
C.at best
D.at a loss
解析：
本题选B。