7.1 _( walk ) along the street when suddenly  it began

to rain.

6. They_( plant) many trees last  year.

5. Her uncle is a writer and he_(write) ten  books al?ready.

4. We_(study) English for more than three  years.

3. Look' Your cousin Brian _(play) the  guitar over

there.

2. They_( build) four bridges so  far.

根据句意，用括号内所给动词的适当形式填空。

1 .My father_(read) ten books since last  year.

5. 你曾参观过颐和园吗？ ____the Summer Palace?

4. 然而，我还没有游览长城-

However,I__the Great Wall yet.

3. 我已经看过了全北京几乎所有的名胜古迹。

I___all of ihe places of interest  around

Beijing.