问题
选择题
He must have been working really hard these days. This morning, I even noticed ______ behind his ears.
A．grey hair
B．grey hairs
C．the grey hair
D．much grey hair
答案
答案：B
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He must have been working really hard these days. This morning, I even noticed ______ behind his ears.
A．grey hair
B．grey hairs
C．the grey hair
D．much grey hair
答案：B