Question

【题目】Our teachers are always busy __ our homework and they try their best to help us.

A. correctB. correctsC. correctingD. to correct

Answer 1

【答案】C

【解析】

句意：我们的老师总是忙于批改作业，他们尽最大努力帮助我们。

本题考查非谓语动词。correct是动词原形；corrects是一般现在时的第三人称单数；correcting是动名词；to correct是动词不定式。be busy doing sth忙于做某事，故用动名词correcting。故选C。