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21. -- John, it\'s 10 p.m. It\'s time to go to bed now.
-- OK, ______, Mum!
A. good morning B. good afternoon C. good evening D. good night
22. Look, Simon, ______ Walkman that I bought last year isn\'t working properly.
A. a B. an C. the D. ²»Ìî
23. ______ police officers in the UK carry guns, but most of them don\'t.
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21. -- John, it\'s 10 p.m. It\'s time to go to bed now.
-- OK, ______, Mum!
A. good morning B. good afternoon C. good evening D. good night
22. Look, Simon, ______ Walkman that I bought last year isn\'t working properly.
A. a B. an C. the D. ²»Ìî
23. ______ police officers in the UK carry guns, but most of them don\'t.