-----I am sorry the traffic is so heavy.---Does that why you are so late ?A. and; acc

问题补充：

-----I am sorry the traffic is so heavy.

-----Does that why you are so late ?

A. and; account for

B. but; account for

C. and; forgive

D. but; believe in

答案：

A. and; account for

(答案→)B. but; account for

C. and; forgive

D. but; believe in

解析：本题考查连词和动词短语。Im sorry , but……常用句型，but后接表示歉意的原因；account for解释；说明…的原因，是…的原因。