问题
选择题
. Mary had taken _____ to see that her guests had everything that they could possibly want.
A．efforts
B．pains
C．attempts
D．endeavors
答案
答案：B
考查名词。take pains to do sth.下苦功夫做某事。句意：玛丽最终看到她的客人得到一切他们所能够得到的、
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