A.OnAugust12,1877
B.InAugust12,1877
C.At12August,1877
D.In1877,August,12
第1题:
I ()supper when I()someone knocking at the door.
A、made . . . Heard
B、made . . .was heard
C、was making . . . was hearing
D、was making . . . heard
第2题:
第3题:
第4题:
Hurry up! The concert __________ for ten minutes.
A、has begun
B、had begun
C、has been on
D、began
第5题:
第6题: