The doctor （ ） is treating for your heart trouble is a friend of mine.
（A）who
（B）when
（C）which
（D）whom
Do you know the man （ ）?
（A）whom I spoke
（B）to who spoke
（C）I spoke to
（D）that I spoke
The size of the audience, （ ） we had expected, was well over one thousand. 选项：
（A）whom
（B）who
（C）as
（D）that
