Newtechnologytomakesurethatthe

New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.

A．is used; not to pollute	B．has used; is not polluted
C．is being used; do not pollute	D．has been used; to pollute

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The fire started in the basement and quickly____________ to the first floor where it destroyed all the______________ in the language lab.

A．was spreaded;furniture and equipments	B．was spreaded ;furniture and equipment
C．spread;furnitures and equipments	D．spread ;furniture and equipment

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Mary ___________to see you．She．_________ for you downstairs at the moment．

A．has come；is waiting	B．came；is waiting
C．has come；waited	D．came；was waiting

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The bad weather meant__________ the rocket launch(发射)for 48 hours,．

A．delaying	B．having delayed
C．to delay	D．to have delayed

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She was afraid __________ the dog in case it became dangerous.

A．of exciting	B．to excite
C．that she excited	D．to be exciting

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I__________ you somewhere before, but your name has escaped me_________.

A．must see;for a moment	B．must have seen; for a moment
C．must see;for the moment	D．must have seen; for the moment

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