【题目】The family with the aim of travelling by plane ________ more than four times what it was several years ago.
A.have increased
B.has increased
C.were increasing
D.was increasing

【答案】B
【解析】句意：坐飞机旅行的家庭比几年前增加了四倍多。分析句子可知，本句指的是现在的家庭，因此从时态来说，C与D的时态是不对的。本句的主语是the family是单数，根据主谓一致的原则，谓语动词要用单三式，因此选B。