1 . As the educator puts it, ________ (expand) your knowledge by reading more books is a wise choice. (所给词的适当形式填空)

2 . All in all, it is high time that we devoted ourselves to ________ (protect) oceans. （所给词的适当形式填空）

4 . 我认为，去泰山的路线是一个更好的选择。
As far as I’m concerned, ________________ is a better choice.

6 . Now that you are wrong, you should have the courage to admit ________ (make)mistakes. (所给词的适当形式填空)

7 . Last Sunday witnessed my ________ (participate) in a meaningful activity named “Getting to Know the Plants Around Us” organized by the Students’ Union. (所给词的适当形式填空)

8 . 他在如此短的时间内写完作文使我们十分惊讶。(主语从句)
_________________ surprised us all.

9 . Factory farming involves ________ (keep) farm animals inside buildings to increase the production of meat or eggs. (所给词的适当形式填空)

10 . 他因未能获奖而失望得把自己锁在房间里。
________________, he locked himself in his room.