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  3. Ever since the Smiths moved to the suburbs a year ago, they______better health.

Ever since the Smiths moved to the suburbs a year ago, they______better health.

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问题 Ever since the Smiths moved to the suburbs a year ago, they______better health.
选项 A、are enjoying
B、have been enjoying
C、could have enjoyed
D、had enjoyed
答案B
解析 ever since表示自过去的某个时间直到现在为止，所以谓语需用完成时态。如果过程已经结束，需用现在完成时；如果过程尚未结束，需用现在完成进行时。
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