I.用所给动词的适当形式填空
1.It’s time for you _______ (talk) in class.
2.His family was very poor, but he never gave up _____ (study).
3. I didn’t go out until stopped _____ (rain).
4. He always practiced _____(speak) English with others.
5. I believe that I will be able _____ (catch) up with others.
