精选优质文档-倾情为你奉上Unit 6单元测试题. 单项选择从A、B、C、D四个选项中选择可以填入空白处的最佳答案。( )21. Mr. Green is a kind man. He always tries his best to help _ weak.A. a B. the C. an D. 不填( )22. We have different opinions _ the matter.A. about B. of C. in D. at( )23. We wont put off having the sports meeting _ it rains.A. if B. unless C. as soon as D. so that( )24. Mom