1 . Students should get actively involved in after­class activities. They can gain experience for social communication.
→Students should actively involve themselves in after­class activities ________________. (定语从句)

2 . It________ (estimate) that the project will last four years,________ (generate) a lot of interest since last month. (所给词的适当形式填空)

3 . Happiness and success often come to those _______ are good at recognizing their own strengths. (用适当的词填空)

4 . The burn that she got from the iron was red and it was very painful. (改为省略句)
→_______________ was red and very painful.

6 . There________a wooden tower in the village, but now it is gone.

A．used to have

B．used to be

C．was used to have

D．was used to be

9 . There comes the time ________________ to study. (每个人都不遗余力地…). (用定语从句) (根据汉语提示完成句子)

10 . ________is known to all, the earth is round.（用适当的词填空）