题目内容
2. You’d better (buy) a new book.
2. buy
5.学校课题
6.在火星上
7.在宇宙飞船里
1.地球是一颗行星，它绕着太阳转。
The earth is a planet and it the sun.
( ) 8. She’s not strong enough walk ing up mountains.
A. to go B. going C. go D. went
2.数百万年前，地球上就有生命。(millions of)
1.你了解宇宙吗？(know about)
2. Mr Li America several times.
4. —Has David been to Chengdu?(作肯定回答)
( ) 2. 一Hello,may I speak to Zhang Jun?
—Oh,sorry!He to Guiyang.
A，has been B. has gone
C. went D. will be
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