My family consider a computer which is considered a great help in our work and study.A. t

问题补充：

My family consider a computer, which is considered a great help in our work and study.

A. to buy, to be

B. buying, being

C. to buy, being

D. buying, to be

答案：

A. to buy, to be

B. buying, being

C. to buy, being

(答案→)D. buying, to be

解析：此题重点考查consider doing sth和consider to do sth的区别。一般情况下不定式表示未做的事情，而动名词表示已经做过的事情。 如：stop to do/ stop doing 意思有变化。但consider做考虑的意思讲时，后面只能跟doing sth, 意思是考虑做某事。consider to do sth的用法在英语中基本是不正确的。