根据以下材料回答: What kind of the course is E244? A) It's a composition one. B) It's a conversational one. C) It's for listening skill. D) It's a grammar one.
参考答案:
答案解析:
It is a great pity that we ( not catch) ______the train.
It is a great pity that we ( not catch) ______the train.