摘要: I wonder why Jenny us recently. We should have heard from her by now. A. hasn't written B. doesn't write C. won't write D. hadn't written [解析] 时间状语recently常与现在完成时连用.We should have heard from her by now.的意思是“目前我们应该收到她的信了. 一些考生把should have heard from her理解成“本来不该收到她的信而收到了 .发生了错误.should在这里用于表示可能性.估计.猜测或推论.如:They should have arrived at the station now.他们现在该抵达车站了.答案为A.

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