题目

一个星期有7天，28天是________个星期。 答案：【答案】4【解析】用总天数除以一个星期的天数即可求出28天是几个星期.28÷7=4(个)故答案为：4―Isn’t it hard to drive downtown to work?―Yes, that’s why I _____ to work by train.               A. have gone                B. will have gone   C. have been going       D. had been going