they went to Beijing ___ a bad time of yeara.in b.forc.at d.on
问题描述:
they went to Beijing ___ a bad time of year
a.in
b.for
c.at
d.on
答
c. at在一年中坏的时间他们去了北京
答
c
在一年中最坏的时间他们去了北京