We calmed the old lady down. 我们使老太太平静下来。 We have got to solve this problem before tomorrow.我们必须在明天之前解决这个问题。She is concerned about your safety. 她不放心你的安全。 I must walk the dog;he hasn't been out today.我必须带狗去散散步;它今天还没出去过。 She helped the child loose the laces of his shoes. 她帮孩子解开鞋带。...
