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—How clean the bedroom is!

—Yes, I am sure that someone_________ it．

A．cleans           B．cleaned              C．has cleaned          D．had cleaned

根據(jù)下列句子及所給漢語注釋或通過上下文，  在答題卡上標有題號的橫線上，寫出空缺處各單詞的正確形式。每空只寫一詞。

1.Many rare wild animals have    （消失）because we didn't protect them.

2.The results of the exams will be    （宣布）in the afternoon.

3.She likes the children very much and she is very    （耐心的）with them.

4.Can you give me some    （建議）?I believe they will be very useful.

5.He seldom    （回復）to the e-mails his friends send him.

6.Making a lot of noise and    (打擾)others are impolite.

7.Walking    （有規(guī)律地）is a good form of exercise for both young and old.

8.---Look! Here comes out school bus.  --- No hurry. Don't get on it    it has stopped.

9.---How clean the bedroom is!  ---Yes, I am sure that someone    it.

10.---Thank you for your help. Without your help, I couldn't work out the problem last night.

  ---It's my    ．