題目：
Although she had little experience working with computers,
Ms. Lopez is often able to assist customers ______ technical support.
A.require
B.requiring
C.requirement
D.requried
答案是Ｂ
解題思路：需要形容詞，所以剩Ｂ、Ｄ可以選，而形容的對象是technical support
所以應該是要被動式，所以我選Ｄ。
懇請各問大大解答

to assist customers who require technical support.

感謝Ｙ大...原來是在形容customers

如果題目to assist technical support _____by customers,就是你選的D

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