问题
There are a number of cases _______ family members or friends quarrel with each other and become enemies.
A:that
B:which
C:where
D:when
B:which
C:where
D:when
正确答案是：
同类题型
They _______ some books from the librarylast week.
He was told that it would be at least three more monthshe could recover and return to work.
Sometimes, the entrance tickets are _____free of charge from the university.[ ]
orld economic crisis_________, peopleappeal to the government for more unemployment benefits.