（上海卷38）. Wind power is an ancient source of energy we may return in the near future.
| A．on which | B．by which | C．to which | D．from which |
—I’ve told Nancy many times about the meeting, but she still forget it!
—I understand. Actually, anyone ______ be very forgetful at times.
| A．must | B．should | C．ought to | D．can |
— David, keep ______ in mind that you have to be home by 10 o'clock.
— OK, Mom, I will.
| A．/ | B．me | C．this | D．one |
The lift ______ and we were trapped inside it.
| A．broke down | B．broke up | C．broke out | D．broke in |
______ all my homework unfinished, I am not allowed to go online to play games.
| A．As | B．For | C．Without | D．With |
A 3G mobile phone, ______to be most useful and fashionable, is popular with some teenagers.
| A．consider | B．considering | C．considered | D．to be considered |