After the earthquake,thousands of PLA took part in the rescue____they had a race with time.a.whichb.thatc.whered.when

问题描述:

After the earthquake,thousands of PLA took part in the rescue____they had a race with time.
a.which
b.that
c.where
d.when

c,where引导一个定语从句.在那里,他们将展开一场与时间的赛跑.