4. 晚上可能冷，所以带上一件毛衣。

It                     in the evening,so bring a sweater.

3. 最好的计划是9月份到达伦敦。

The best plan is             in London in September.

2. 他搬到美国去了，我们有时互通邮件。

He has moved to America,and we email each other                    .

1. 游览中国的最佳时间是什么时候？

2. When is                       China?

8. It will be snowy tomorrow. (改为同义句) 

                  snow tomorrow.

7. Our plan is to go to Shanghai for a trip. (对画线部分提问) 

            your plan?

6. To work with you is very enjoyable. (改为同义句) 

      very enjoyable             with you.

5. The best time is spring if you want to visit Kunming. (改为同义句) 

The best time for you             Kun ming is in spring.

4. We should wear warm clothes in winter. (对画线部分提问)

                  you wear in winter?

3. What's the weather like today? (改为同义句) 

            the weather today?