西北地区的地形以 和 为主，东部高原以 、 景观为主。
高原；盆地；草原；荒漠
下列各类需要中应当首先满足的需要是
A．缺氧B．睡眠C．娱乐D．与同室病友交谈E．护士自我介绍
Fll in the blanks with the right forms of the given words. 用所给单词的适当形式填空。
1. What can you see in the different ( season) ?
2. Trees have green ( leaf) .
3. I (listen) to the radio tomorrow.
4. Danny runs ( fast) than the police officer.
5. Jenny ( swim) in the lake last summer.
6. Danny (take) off his sandals.
7. I like (watch) the birds fly in the sky.
8. The ocean is (salt).
9. There (be) many white clouds in the sky.
10. Look at (that) beautiful flowers.
