用不定代词other, others, one... the other, each other填空。

1. There are two pictures on the wall. _____________ is the picture of the Great Wall, _____________ is

    the picture of the Summer Palace.

2. My sister bought two dresses for me. _____________ is white, _____________ is yellow.

3. Lily is my sister. I have _____________ sister.

4. Jim and Tom helped _____________.

5. There are many students in the classroom. Some are reading books, _____________ are writing letters.

沂南某学校准备利用暑假实地考察我国境内已知最早的人类遗址，他们应该去

A．云南元谋

B．北京房山

C．陕西蓝田

D．浙江余姚