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题型：单选题题类：常考题难易度：普通

——Your bedroom is dirty. Please tidy _____ up.

——Ok, mum.

A、 it B、its C、them

举一反三

The question is very difficult and of the students can answer it.

This is my pen pal. ____ name is Lucy, and ____ is from Canada.

Look at the photo. The girl beside ________ is Mary.

There are ________ of books in the library.

You'd better not read today's newspaper because there is ___in it.

Alice always helps ______________ people. How kind she is!

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