No sooner _____ themselves in their seat
问题:
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
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