2019年mpa考试英语真题——介词和介词短语2417

{01}Most Americans would prefer to keep their problems _____themselves, and solve their problems ______ themselves. A.to; by B.by; to C.for; to D.in; on 解析：句意为：大多数美国人宁愿让他们对自己的问题并自己解决他们的问题。By oneself表示“单独地，独自地”的意思。
本题选A。
{2-How amazing it is that astronauts are exploring outer space!  
-It’s a challenge, I guess, _________man against nature.   A.of B.for C.by D.about 解析：应答句中的I guess是插入语，因此所填介词与challenge连用，表所属，用of，选A。
本题选A。