_______ travelling expenses rising a lot, we had to change all our plans for the tour．

    A．As               B．By               C．Since            D．With

The desks in our classroom are so close together that there is not enough room to move       them．

    A．between          B．in               C．across           D．over

．When he goes out, he often wears sunglasses _______nobody can recognize him．

    A．so that          B．now that         C．in case          D．as though

The news was a terrible blow to her, but she ______the shock soon．

    A．got out          B．got over         C．got off         D．got through

Don't you think _______of great importance that we should keep fit by taking exercise regularly?

    A．this             B．that            C．which            D．it

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

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

_______ 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

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

During the economic crisis, we should help those for ______life is far from easy．

    A．whom             B．whose            C．who              D．whoever