Unit 1 Living w ith technology
单元测试
一、单项选择
1. I felt quite ________ what I was supposed to do then.
A. unsure of B. uncertain about C. certain D. sure
2. He said he would come; He didn’t , ________.
A. even if B. even though C. although D. though
3. Ten ________ the students are absent.
A. per cent of B. percentage of C. per cent D. percentage
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