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The old man hasn’t heard ____ his son for a long time. This makes him really worried.
A、by
B、for
C、in
D、from
【正确答案】：D
【题目解析】：固定搭配，hear from 表示收到某人的来信，本题句意是，那位老人很久没有收到儿子的来信了，他十分担心。