课时作业1
Ⅰ.根据提示写出单词的正确形式
1. We must p________ commerce with neighboring countries.
2. I lost my b________ and fell off the bike.
3. The a________ rainfall is little in the desert, so almost no plant can grow there.
4. It took the fire fighters a long time to rescue the people ________(trap) on the upper floor.
5. Plant the seeds at a ________ (deep) of about 2 cm.
6. Difficult books are sometimes ________(adapt) for use in schools.
7. It is true during their ________ (explore)they often faced difficulties and dangers.
8．Nowadays, many people, youths in particular, show great interest in e________ sports like bungee jumping.
9．Without the author's permission, none of these can be used for c________ purposes.
10．After ________(drift) on the sea for over one hundred days, Guo Chuan returned to his home in Qingdao yesterday.
答案：1.promote 2.balance 3.annual 4.trapped 5.depth 6.adapted 7.exploration 8.extreme 9.commercial 10.drifting
Ⅱ.用方框里的短语填空
