7.Her remarks left me wondering ________she would have changed so suddenly.
A when
B how
C whether
D what
8. Lily had taken pains to _______ that her guests had everything they could possibly want.\
A see
B know
C feel
D learn
9.The only thing _______ really matters to the parents is how soon their children can return home.
A what
B that
C which
D this
7. 正确答案：B、
译文：她的话使我好奇地想知道她怎么突然改变了。
解析：when 当……时，how如何，怎样、怎么;whether 是否，what 什么，根据句意，只能选用B项。
8. 正确答案：A
译文：莉莉尽了很大的努力来确保她的客人们拥有他们可能需要的一切。
解析：(to) see to it that …的简化形式，以为“确保”
9. 正确答案：B
译文：父母们真正在意的是他们的孩子什么时候回到家。
解析：本题考察的是定语从句的连接词的问题，如果先行词被only等词修饰时，关系代词常用that.
