问题
选择题
After retirement, learning a musical instrument may be harder than ______ when you were a kid.
A．it may
B．it was
C．it does
D．it did
答案
答案：B
考查时态。根据句意可知用一般过去时。句意：退休后，学习乐器可能比你们在孩提时更难。
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