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4. They are our new members. They come from Harbin.(改為含定語從句的復(fù)合句）

They are our new members              Harbin.

3. It's a large crowd.(改為感嘆句） 

               large crowd！

2. We all regard him as the best student in our class.(改為被動(dòng)語態(tài)）

He                  the best student in our class.

        the tall building        ？

10. Every year,           (數(shù)百萬的)tourists come to visit the Great Wall.

9. Students          (被允許)take part in making their school rules.

8. My sister _______________ (堅(jiān)持)playing the piano every day.

7. John      (對(duì)……感到滿意)what we're doing for him.

6. Your dress                   (與……相似）Mary's.

5. There's           (沒有疑問）that he can work out the problem.