单选题：What didn’t Mr．Cousins do in his experiments With laughter

题目内容：

What didn’t Mr．Cousins do in his experiments With laughter A．Watch funny TV show
B．Read funny book
C．Sleep whenever he felt tire
D．Take medicin

参考答案：

答案解析：

What didn’t Mr．Cousins do in his experiments with laughter7．

What didn’t Mr．Cousins do in his experiments with laughter7．A．Watch funny TV sho

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