Hurry up or we'll be late for the concert A. If we didn't hurry, we'll be later for the concert B. Unless we hurry, we'll be late for the concert C If we don't hurry, we'll be later for the concert D. Unless we hurry, we won't be later for the concert Chọn đáp án đúng

I congratulated Mai ........passing the exam A. on. B.for. C.in. D.about Trọn đáp án đúng nhất

Although / traffic / heavy // we / come/ meeting / on time viết câu hoàn chỉnh