Linda feels exhausted because she _____ so many visitors today.

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问题 Linda feels exhausted because she _____ so many visitors today.

选项 A、has been having
B、had been having
C、was having
D、had had

答案A

解析 have/has been doing的用法是指过去的动作或状态从过去某时开始,持续到现在,可能持续下去,也可能刚刚结束,多用于可延续性动作.本题主句用的是一般现在时,所以从句也应该与现在时有关。如:Hehash’t been having much luck since he came here.(自从来到这里他就不太走运。)故A项为正确答案。
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