We should always keep________ touch with our customers.A、inB、atC、onD、underAk

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问题 We should always keep________ touch with our customers.

选项 A、in
B、at
C、on
D、under

答案 A

解析 keep in touch with sb为固定短语，意为“与某人保持联系”，符合句意要求。

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