It ( ) around six o'clock when I drove b
问题:
It ( ) around six o'clock when I drove back yesterday because it was already dark.
A.must have been
B.must be
C.was to be
D.had to be
It ( ) around six o'clock when I drove back yesterday because it was already dark.
A.must have been
B.must be
C.was to be
D.had to be