——Why couldn’t they catch the 6:30 train
问题:
——Why couldn’t they catch the 6:30 train ?
——Because they were delayed by .
A.some heavy traffics
B.heavy traffic
C.a heavy traffic
D.any heavy traffic
——Why couldn’t they catch the 6:30 train ?
——Because they were delayed by .
A.some heavy traffics
B.heavy traffic
C.a heavy traffic
D.any heavy traffic