问题
选择题
—What would you do if you injured your knee while running?
—I'd stop _____．[ ]
A．to exercise
B．exercising
C．exercised
D．exercise
答案
答案：B
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—What would you do if you injured your knee while running?
—I'd stop _____．[ ]
A．to exercise
B．exercising
C．exercised
D．exercise
答案：B