用所给动词的适当形式填空。

1. You should always               (speak) English in class.

2. Why don't you               (write) down the correct words?

3. It's a good idea               (check) your vocabulary notebook.

4. How about               (listen) to the radio in English?

5. Try not               (translate) every word when you learn English.

6. Everyone should               (have) a pen friend.