Paper produced every year is __________ the world’s production of vehicles.
A．the three weight of B．three times the weight of
C．as three times heavy as D．three times as heavier as
The plan to be carried out next month needs________among the members of the labor union before________.
A．to discuss；carrying out B．to be discussed；carried out
C．discussing；being carried out D．discussed；to be carried out
It is impolite to sit there with your feet _____ at somebody.
A．pointing B．pointed C．being pointed D．point
Sam________some knowledge of the computer just by watching others working on it.
A．brought up B．looked up C．picked up D．set up
If the babysitter cannot come tomorrow，do you mind________alone at home，doing his homework?
A．Fred’s leaving B．Fred being left
C．Fred’s having left D．Fred having been left
Now that you’re grown up，you’d better spend your time just on the things you find_______.
A．worth doing them B．worth being done
C．worthy of doing them D．worthy of being done
