4. They have read the book twice.(对画线部分提问)

            have they read the book?

3. He worked here three years ago.(用 since three years ago改写句子)

He             here since three years ago.

2. Whenever you come to my house,I will welcome you.(改为同义句)

                     you come to my house,I will welcome you.

1. Three fourths of the students are interested in English.(改为同义句)

              of the students are interested in English.

5. 最好在晚上观看狐狸。

It’s best                    at night.

4. 你将能在新加坡找到一些好吃的东西。

You’ll                   find something good             in Singapore.

3. 我发现试图把每件事情都做好并不容易。

I found       not easy to             do everything well.

2. 英国的天气一年到头很暖和。

The weather in Britain is warm             .

1. 他们上周去度假了。

They             last week.

(   ) 10. —What do you usually do in the morning?

—I often practice        English.

   A. speak   B. to speak

   C. speaking   D. to speaking