–When did he come back last night? --It
题型:选择题
问题:
–When did he come back last night?
--It was at 8 o’clock ________ I was watching a documentary on TV.
A.since
B.that
C.when
D.which
–When did he come back last night?
--It was at 8 o’clock ________ I was watching a documentary on TV.
A.since
B.that
C.when
D.which