Question

【题目】Look! The students _____ the classroom.

A. cleanB. are cleaningC. cleaning

Answer 1

【答案】B

【解析】

句意：看！这些学生们在打扫教室。clean打扫，动词原形；are cleaning现在进行时；cleaning现在分词。根据句中look可知表达的是正在进行的动作，故用现在进行时be+doing，主语the students复数，故are，故答案是B。