问题
选择题
At that time we lived in houses which ___________ old, cold and unsafe.
A．are
B．were
C．is
D．was
答案
答案：B
根据时间状语可知用过去时态，且which指代先行词houses，为复数形式，故答案为B。
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At that time we lived in houses which ___________ old, cold and unsafe.
A．are
B．were
C．is
D．was
答案：B
根据时间状语可知用过去时态，且which指代先行词houses，为复数形式，故答案为B。