During the economic crisis, we should help those for ______life is far from easy．
A．whom B．whose C．who D．whoever
Computers can do nothing．But once ______what to do, they show extraordinary power to do a great deal．
A．to program B．being programmed
C．programmed D．having programmed
_______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．
A．Being examined B．Examining
C．Examined D．Having been examined
What a pity! ________joined in the party, I would have met my old friend．
A．lf I have B．Had I C．I had D．Have I
Today's homework was easy _______so I finished it quickly and went out to play．
A．to be done B．done C．doing D．to do
Don't you think _______of great importance that we should keep fit by taking exercise regularly?
A．this B．that C．which D．it
