— What are the _______ doing there?— They are busy _______ their science experiment.A.Boys students;

题目简介

— What are the _______ doing there?— They are busy _______ their science experiment.A.Boys students;

题目详情

— What are the _______ doing there?
— They are busy _______ their science experiment.
A.Boys students; to doB.Boy students; to do
C.Boys students; doingD.Boy students; doing
题型:单选题难度:偏易来源:不详

答案

D
考查名词复数和非谓语动词的用法。男学生的复数表示为boy students,固定结构“be busy doing sth”忙于做某事。

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