34.It was raining hard, they has to stay at home.
34.It was raining hard, they_____ stay at home.
A. must B. would C. had to D. could
前面是they为什么用has to 而不用must??
参考答案:不是has to是had to
had是have的过去式,have to在这里的意思是"他们不得不呆在家里"
或者"只能"
must是必须的意思..这里没有表示这个语气