Unit 4 I used to be afraid of the dark练习题一单项选择( )1. Only a small number of students able to pass the exam. Yes. The number no more than 20.A. is; is B. are; is C. is; are D. are; are( )2.Mike , youve got so many beautiful stamps . Yeah. I collect stamps when I was 8 years old . A was used to B used to C am used to D used ( )3.Our hometown a lot in the last few years . A changed B has changed C is changing D change
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