英语 lack
问题描述：
英语 lack
They cannot complete the work on time because they ________ hands.
A.lack
B.are lack of
C.short of
D.lack of
我选了B 请大人分析此题
答
lack v．缺乏n．[u]缺乏；短缺
lack (vt.)the necessary information缺乏必要的信息
lack vt.= be lacking in = be short of缺乏：不足
because of a lack of sth. = for lack of sth.因为;缺少