Unit 1 Living with 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
