题目

—Good news! We will have a ________ holiday.—I’ve heard of it. But it’s coming in ________.A．three days; three days’ time B．three days’; three days’C．three-day; three daysD．three days; three-day time 答案：C解析:略4．甲数是乙数的$\frac{9}{5}$，乙数是甲数的$\frac{5}{9}$．