Question

【题目】Your bedroom is very dirty. Please _______ at once.
A.clean up it
B.clean it up
C.clean up them
D.clean them up

Answer 1

【答案】B
【解析】句意：你的卧室非常脏，请立刻打扫一下。根据句意及题干分析clean up是打扫的意思，这是一个动词加副词构成的词组，宾语是代词时要放在词组中间；指代上文的bedroom应用it，故选B。