问题
Several weeks had gone by _______ I knew the painting was missing
A:as
B:since
C:until
D:before
B:since
C:until
D:before
正确答案是：
同类题型
o dogs ______ a bone, and a thirdruns away with it.
58. The little boy has learned many Tangdynasty poems _____ though he is very young.
It ________ we had stayed together for a couple of weeks _________ I found we had a lot in common
Jack, is this your jacket–No, it _______ be my jacket. My jacket is black but this one is blue.