题目内容
【题目】It has been a month since I last ____ your letter.
A. receive B. received C. have received D. was receiving
【答案】B
【解析】句意：我已经有一个月没收到你的信了。since时间连词，自从；后常跟过去的事件，所以谓语动词使用过去式。receive动词，接收、收到；received过去式。故选：B。
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【题目】It has been a month since I last ____ your letter.
A. receive B. received C. have received D. was receiving
【答案】B
【解析】句意：我已经有一个月没收到你的信了。since时间连词，自从；后常跟过去的事件，所以谓语动词使用过去式。receive动词，接收、收到；received过去式。故选：B。