Question

【题目】—Look! Someone _____the classroom.
—Well, it wasn't me, I didn't do it.
A.is cleaning
B.was cleaning
C.has cleaned
D.will clean

Answer 1

【答案】C
【解析】句意：—看！有人已经打扫了教室。—很好，它不是我，我没有做这件事。根据it wasn't me, I didn't do it.可知打扫教室这件事已经发生，根据Look！可知从此表示现在看到的结果，应是到现在为止已经发生了，并对现在造成影响，故用现在完成时。故选C。