问题
选择题
They considered ______ a computer, which was considered ________ a great help in their work.
A．to buy; to be
B．buying; being
C．to buy; being
D．buying; to be
答案
答案：D
考查动词consider 的用法:考虑做某事 consider doing, 被认为 be considered to be ,根据题意应选D 。