1 . The great scientist made a positive___________(贡献) to further space exploration. (根据汉语提示单词拼写)

2 . They are a particularly interesting ________(物种) because they form lifelong partnership. (根据汉语提示单词拼写)

3 . Every fourth year, a________from all over the world compete in the Olympic Games. （根据首字母单词拼写）

4 . The t________, who makes the greatest clothes in the town, lives on that street. （根据首字母单词拼写）

6 . We work with ________(志愿者) of all ages and backgrounds. (根据汉语提示单词拼写)

7 . We as ________(个人) should make all efforts to prevent wildlife from being extinct. （根据汉语提示单词拼写）

8 . He’s a lonely old man who only has his dog to keep him c________.（根据首字母单词拼写）

9 . It was raining heavily, so people took s________from the rain in the store. （根据首字母单词拼写）

10 . The reporters got into the building secretly without________(许可). （根据汉语提示单词拼写）