问题
选择题
No sooner _____ themselves in their seats in the theatre _______ the curtain went up.
A．they have settled; before
B．had they settled; than
C．have they settled; when
D．they had settled;than
答案
答案：B
no sooner…than…,hardly…when…结构中，主句应用过去完成时的倒装结构。故选B。
