“Why couldn’t they meet us at five o’clock?” “Because they were delayed by ________.”
#7317
A
heavy traffic 
B
heavy traffics
C
crowded traffic
D
crowded traffics
推荐题目
By all _______, you must try every _______ to help him.
#7316
A
mean, mean
B
means, means
C
means, mean
D
mean, means
Scientist are not sure about the ___________ of water on the Mars.
#6679
A
occupation
B
existence
C
demand
D
treasure