1 . 在过去的500年里，300多种物种已经灭绝了。
In the last 500 years, over 300 species of animals have __________ __________.

2 . Something is wrong with the clock. Can you get it ________________ (go) again? （所给词的适当形式填空）

3 . All the staff in our company are considering ___________(go) to the city centre for the fashion show.

4 . 在英国上了一年的中学对我来说是一段非常令人愉快和兴奋的经历。
______ _______ a British school for one year was a very _______ and _____   _______ for me.

5 . 离比赛结束只剩几分钟的时间，还是平局。
The match was tied with minutes ___________ ___________.

6 . The writer and teacher Smith _________ (go) through millions of ups and downs since he moved to Sydney. （所给单词适当形式填空）

7 . Police in America have stepped up their search for a fifteen-year-old boy who went _____ three days ago.

A．going	B．losing
C．missing	D．disappearing