Ⅰ.用所给动词的适当形式填空
1.The possibility that there is life on other planets in the universe has always inspired scientists (explore) the outer space.
答案to explore
2.A few students hesitated (start).They waited to see what the rest of the class would do.
答案to start
3.The youngsters admitted (plan) trips around potential photo-opportunities and then messaging friends.
答案planning
4.So scientists are trying their best to save the species from going out of (exist).
答案existence
5.For Pahlsson,the ring’s return was wonder.
答案a
6.Still,most of us volunteers (breath) a sigh of relief when the season comes to a close.
答案breathe