课时作业(四十)
Ⅰ.单词拼写
1．They built a________(原始的)shelter out of tree trunks.
[答案] primitive
2．She said that she had no________(选择)but to wait for her chance.
[答案] alternative
3．Don’t ________(打断……讲话) the speaker now；he will answer questions later.
[答案] interrupt
4．When she was ________(逮捕)，the detective found out that the shop assistant was her daughter.
[答案] arrested
5．My family has a vase，which is said to ________(追溯) back to the Ming Dynasty.
[答案] date
Ⅱ.用所给词的适当形式填空
1．The kitchen knife has become dull，so Mother asked me to ________(sharp)it.
[答案] sharpen
2．There are many rubber trees in the ________ (botany) garden which can produce a lot of rubber every year.
[答案] botanical
