问题

He disappeared last month, _____ we have heard nothing of him[ ]
A: when
B: after which
C: from which
D: since when
B: after which
C: from which
D: since when
正确答案是:
同类题型
Sometimes it is hard to tell how a quarrel___ . [ ]
What’s your math teacher like—He is_______. We are a little afraid of him.
Remember the first time we met, Mary? —Sure.You ______ in the supermarket
was so excited at the news that I could hardly ______ my feelings in words.
What do you think of French? — In my opinion, French is _______ English[ ]