he has to be ____ bed ___ nine o'clock A、at;at B、to;by C、in;

he has to be ____ bed ___ nine o'clock A、at;at B、to;by C、in; I go to bed ( ) about nine o'clock every day.A.at B.in C.on He goes to bed at nine o'clock 对 at nine o'clock提问 I have to be in bed ___ ten o'clock.选A还是C呢?A.at B.in C.befor I have to ____ (be)in bed by nine o' clock 英语翻译 He usually go to bed at nine o 'clock in the evening. I go to bed at nine o'clock in the evening.这句话里,at Go to bed at nine o'clock.改为否定句 I go to bed at nine o'clock. 1.She has to go to bed ____ nine o'clock.A.afte He with his brother ( ) to bed every night at nine o 'clock括 i go to bed at nine o'clock every evening对 nine o'clock 提问