1 . The scientists are trying to learn about he harmful effects of ________(化学品) on humans and on the world’s lakes and the ocean. （根据汉语提示单词拼写）

2 . These dinosaur fossils are beyond ________ (recognize) without signs. （所给词的适当形式填空）

3 . The plane crashed in an area of dense jungle. There were no ________ (survive). (所给词的适当形式填空)

4 . What I want is not just an ordinary cafe __________ a very special one.

5 . From time to time I look at the photo as a __________ (remind) to show respect to all animals. (所给词的适当形式填空)

6 . According to a rough ____________ (估计), at least 5, 000 people were killed.

7 . To make our country stronger, everyone should make his/her ________ (contribute). （所给词的适当形式填空）

8 . He now faces a fight to the ________ (die) to reach the quarter­finals.（所给词的适当形式填空）

9 . He is in lawful______________________________________of a short gun. (possess) (所给词的适当形式填空)

10 . Californian action camera manufacturer GoPro has laid off between 200 and 300_____(staff), according to a recent report. (所给词的适当形式填空)