I’ll be free ___ seven o’clock. A．after B．on C．in D．at

At seven o'clock- the evening of Marth8.A.in B.on C.at D.for I often go to school ( ) seven o'clock.A.at B.in C.on i must go to bed now.It's()eleven o'clock.A.at B.in C.on D.a I have to be in bed ___ ten o'clock.选A还是C呢?A.at B.in C.befor I go to bed ( ) about nine o'clock every day.A.at B.in C.on he has to be ____ bed ___ nine o'clock A、at;at B、to;by C、in; 70.Be home ________ 8 o’clock on Saturday.A.by B.to C.on D.i I will be home at seven o'clock.【汉译】 I will go to beijing_________ two o'clock A after B in C lat --What's the time ---It's ____ eight o'clock .A.at B.on C.in We are going to school _____ about seven.A.at B.on C.in D.to Classes begin () seven fifty -five.A、in B、on C、at D、for