按要求完成下列句子，每空一词。

1. It's sunny today. (对画线部分提问)

    ___________ the ___________ like today?

2. There are twenty birds in the cage. (对画线部分提问)

    ___________ ___________ birds are there in the cage?

3. Close your book, please. (改为否定句)

    ___________ ___________ your book, please.

4. Liu Tao is writing a letter to his grandpa. (改为一般疑问句)

    ___________ Liu Tao ___________ a letter to his grandpa?

5. She watched TV just now. (改为一般将来时)

    She is ___________ to ___________ TV this evening.

图5—14表示南美洲部分气温及降水分布，读图完成下列要求：

图5—14

（1）大陆东西两侧沿海10℃等温线经过地区的降水量分别为         、         。说明造成A地降水量偏低的主要原因。

（2）说明南回归线附近大陆两岸平均温度差异的形成原因。

（3）位于潘帕斯草原的B地1月月均温19.8℃，7月月均温8.5℃，年降水量912mm。简述B地发展畜牧业的有利自然因素。