Ⅰ.单词拼写
1．His father works in a chemical ________(研究院) in our city.
2．There are now more than six ________(十亿) people living on the earth.
3．Though he was defeated，he was highly respected by his ________(对手).
4．It is rather ________(残忍的) for humans to keep the animals in small space.
5．For ________(例子)，the number of pandas is on the increase now.
6．That man ________(声称) that he would go to the court to demand for his rights.
7．This kind of change is called a ________(化学的) change.
8．The ________(药物) tend to cause drowsiness.
【答案】1.institute 2.billion 3.opponent 4.cruel 5.instance/example 6.claimed
7．chemical 8.drugs
