1 . People doing experiments choose a ____________ (随机) sample of people to take part to make the results more reliable. (根据汉语提示单词拼写)

2 . It is ____________ (估计) that up to 50% of the areas population died from the epidemic. (根据汉语提示单词拼写)

3 . They have had several ____________ (意见不合) with their neighbors. (根据汉语提示单词拼写)

4 . Jim Smith looks at the _____________(沮丧的) history of epidemics for clues. (根据汉语提示单词拼写)

5 . There is a____________ (绝对) nothing to be gained by feeling bitter. (根据中英文提示填空)

6 . John had always ____________ (妒忌) his sister her youth and strength. (根据汉语提示单词拼写)

7 . He beat the pillow in an effort to _____________(释放) his anger. (根据汉语提示单词拼写)

8 . There’re many _____________(理论) about the origin of life. (根据汉语提示单词拼写)

9 . It ______(以……为特点) a parade and a great feast with music, dancing and sports. (根据汉语提示单词拼写)

10 . We asked him to come to our party, but they d___________ (谢绝) the invitation. (根据中英文提示填空)