题目

Only______ according to the directions can the medicine be quite effective. A．taking   B．takenC．being takenD．having been taken   答案：B【1】You should make up the bed every day. (改为被动语态)The bed _______ _______ _______ up every day.【2】We can’t see stars in the day time. (改为被动语态)Stars _______ _______ _______ in the day time.【3】You must return the book on time. (改为被动语态的一般疑问句形式)_______ the book _____ _________ on time?【4】You must give back the dictionary before Friday. (改为被动语态)The dictionary must _____ _______ back before Friday.【5】He should be told about the meeting.(改为一般疑问句)________ he _____ told about the meeting?【6】The machine can be used for washing dishes. (对画线部分进行提问)_____ _____ the machine ______ used for?