题目内容
-A number of volunteers_______ willing to teach in China's rural(农村的) areas.
-Yes, the number is getting_______
-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
试题分析：句意：--许多志愿者愿意去教书在中国的农村地区。--是的，数量是变得越来越大。分析a number of 许多；the number of 表示数量，强调整体；人群的数量越来越大用big/large.故选B
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