问题
选择题
He looked quite healthy ____ he was ____ the age of seventy.
A．when; at
B．because; in
C．if; for
D．though; at
答案
答案：D
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He looked quite healthy ____ he was ____ the age of seventy.
A．when; at
B．because; in
C．if; for
D．though; at
答案：D