【題目】My friend, Tom, left New York in 1976 and _____ since then.

A. hadn't been heard of

B. hasn’t been heard of

C. hasn't heard of

D. hadn't heard of

【答案】B

【解析】考查動(dòng)詞的時(shí)態(tài)和語態(tài)。since then常和現(xiàn)在完成時(shí)連用，Tom和hear為被動(dòng)關(guān)系，句意：我的朋友湯姆1976年離開紐約，從那時(shí)起我就沒有收到過他的消息。

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