21．Do you know ____ friendship plays _____ important part in people’s daily lives.
A. an;the B. /;an C. the ;an D. the ;the
22．Nowadays, a large number of women, especially those from the countryside,_____ in the clothing industruy.
A. is working B. works C. work D. worked
23．In the world , there are more than 42 countries ______the majority of the people speak English.
A. where B. when C. which D. of which
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