2019年mpacc考试英语真题——介词和介词短语260

{01}David studied hard before the examination, and it ______. He made an
A.A.worked out
B.marked out
C.paid off
D.got through
解析：考查短语。据句意it代指戴维考前努力学习，他获得A，应是努力得到回报，所以选C,pay off意为回报。
本题选C。
{02}--- Jimmy had a lot of parties recently.
--- Yes, that might ______ why he didn’t do well in the test.
A.sum up
B.add up to
C.account for
D.count on
解析：短语辨析.   A.总结;B.合计达;C.说明……的原因；D.指望；依靠。句意，吉米最近参加了很多聚会。——是的，那可能说明了他这次考试不好的原因。选C。
本题选C。