1 . Sadly the weather became hot and dry and the dinosaurs were unable to p______ themselves disappearing altogether. (根据首字母单词拼写)

2 . Astronauts have to use tape to stick everything down while working in space because everything would float off________（否则）. (根据汉语提示单词拼写）

3 . When students graduate and apply for jobs, they should know the importance of ________(积累) experience rather than focusing on their starting salary. (根据汉语提示单词拼写)

4 . Doing v________ (done by people who choose to do it without being paid) work is becoming popular nowadays because it benefits the people in need and our society.(根据英文提示单词拼写)

5 . Sitting ________________(舒服地) in the cinema, one can appreciate the latest movies, which will usually be shown on TV far later on. (根据汉语提示单词拼写)

6 . Learning is defined as a conscious process of________(积累) knowledge of a second language usually obtained in school settings. (根据汉语提示单词拼写)

7 . Up to now, new school students of________(义务的，强制) education in 90 percent of the provinces in the country has begun to use the new curriculum. (根据汉语提示单词拼写)

8 . The son，well dressed, ________ (挥手) proudly in the middle while the father behind bends forward to hold the jacket and the mother in front rolls out the carpet，sweating. (根据汉语提示单词拼写)

9 . However，ocean expert Curtis does it in a special way—by studying movements of ________(任意的) floating garbage. (根据汉语提示单词拼写)

10 . John is a________ (懒惰的)student, one of whose bad study habits is to leave for tomorrow what has to be done today. (根据汉语提示单词拼写)