题目内容

Mr Smith always goes for a walk with his dog when he is_________.
A．busyB．freeC．healthD．alone
B

试题分析：通过句中的always goes for a walk可知，史密斯先生应该是在不忙的时候才会去散步，故用free。Busy“繁忙的”，health“健康”，alone“单独地”。所以本题选B。
点评：本题需要注意两点，一是所给词的意思，一个是注意前半句中的 always goes for a walk 。
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