问题
A number of volunteers_______ willing to teach in China’s rural(农村的) areas. -Yes, the number is getting_______
A:is; bigger and bigger
B:are; bigger and bigger
C:is; more and more
D:are; more and more;
B:are; bigger and bigger
C:is; more and more
D:are; more and more;
正确答案是：
同类题型
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