Question

Five minutes earlier, and we______the last bus. A．had caught B．should have caught C．could

Answer 1

C
试题分析：句意：再早五分钟,我们就赶上最后一趟地铁了。根据句意可知事实上没能赶上。Five
minutes
earlier,是隐含的虚拟条件句，相当于：If
we
had
arrived
five
minutes，主句用could
have
done表示“过去本可能做却没有”，should
have
done
“过去本应该做却没做”，选C。

Answer 2

选a
选b的话，可以这么说：we
arrived
at
the
station
within
five
minutes
before
the
last
bus
left.
就是去掉"to
go
’‘意思是：我们在最后一班汽车出发的五分钟内到达。
within
是时间介词，有“范围内”的意思。
with后面常跟“工具性”的单词，表“伴随”，离最后班汽车出发还有五分钟~~
差点弄错了，汗~~~