12. People ……………..produce as much rubbish as we do.
A. used to B. didn’t use to C. didn’t used to D. is used to
13. Summerfest is the world’s largest ….festival. It features more than 700 bands performing on 11 stages.
A. arts B. music C. religious D. seasonal
14. So far, She ……… 4 books and her latest is the best one.
A. has written B. wrote C. writes D. will write
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