In the past half-century, average incomes _______ quickly in developed countrie
题型：不详难度：来源：
In the past half-century, average incomes _______ quickly in developed countries, yet happiness levels have remained almost the same.| A．have risen | B．had risen | C．rose | D．rise |
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答案
| A |
解析
| 考查时态。根据时间状语In the past half-century在过去的半个世纪，可知用现在完成时，选A。 |
举一反三
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