问题
选择题
He's never lost a day's work through illness. He's as ________ as old boots.[ ]
A. strong
B. high
C. rough
D. tough
答案
答案：D
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He's never lost a day's work through illness. He's as ________ as old boots.[ ]
A. strong
B. high
C. rough
D. tough
答案：D