1 . 我们觉得保护和美化我们的环境是我们的责任。（duty）
We feel ________________ protect and beautify our environment.

2 . 能够比较不同的网络商店的质量和价格是非常方便的。 (It is + adj + to do sth; be able to) (汉译英)

4 . However,__________________ enough qinghao extract for large trials because research resources were limited.
然而,由于研究资源有限,很难制造出足够的青蒿提取物用于大规模试验。

5 . It is an honour _________(select) to this band. (所给词的适当形式填空)

6 . It is great fun _________ (play) football with teachers in our spare time. (所给词的适当形式填空)

7 . ________ is said that the president of that company will visit our school next week. （用适当的词填空）

8 . It is important for modern young people _______(master) at least two foreign languages. (所给词的适当形式填空)

9 . It is their responsibility to________(sure) that the plans are carried out. (所给词的适当形式填空)