One in seven accidents is caused by sleepy drivers为什么谓语用单数?谢谢了,大神帮忙啊

This driver got ___(hurt)in the acciden I'm in Class One,Grade Seven.改为一般疑问句 英文句型转换：（同义句）I am in Class One,Grade Seven./Jane is in Class Two,Grade Seven. How to say the number 7810 in English.A.eight seven one zero B.seven eight teHow to say the number 7810 in English.A.eight seven one zero B.seven eight ten C.seven eight one zero D.seven eight six one they are in class One,grade seven.对画线部分提问 画线部分是class One,grade seven急 十分钟之内求回答! I am in Class One Grade Seven改为一般疑问句和否定句 Michael is in Class One,Grade Seven?改为一般疑问句 （Michael是和人） Beijing is one of the seven o___ capital cities in China根据句意填空. They do______homework at seven in the evening.A.the B.one's C.their D.they “We are in Class one,Grade Seven. (用 I 改写句子) 1、I am in Grade Seven ,Class One.2、Jack ,she is my classmate Yang Fang. in the chips seven in the following seven all the people cried _ when they saw one of the seven _ in the world in Egypt.(wonder) How to say the number "7810"in English?(7810在英语里怎么说?) 选项如下：How to say the number 7810in English?(7810在英语里怎么说?) A.eight seven one zero B.seven eight ten C.seven eight one zero D.seven eight six one 另 if i had six oranges in one hand and seven applesin the other,what must i ha急If I had six oranges in one hand and seven apples in the other,what must I have?翻译并回答～ 一个电话号码：five-o-five,seven-double-one-seven 英语翻译Not only seven of emotion in Pennsylvania,and I also have one single body can be in one day feeling.整句