问题
选择题
Teenagers their health because they play computer games too much.
A．have damaged
B．are damaging
C．damaged
D．will damage
答案
B
根据because引导的原因状语的时态，可知前面的时态。
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Teenagers their health because they play computer games too much.
A．have damaged
B．are damaging
C．damaged
D．will damage
B
根据because引导的原因状语的时态，可知前面的时态。