Effective measures have been taken to prevent _______pollution.
| A．exhausted gas | B．exhausting gas |
| C．exhaust gas | D．exhaustion gas |
Linda __________ her glasses with a dry soft cloth.
| A．mopped | B．possessed | C．polished | D．presented |
He told me that in the following days there were other changes, even more _________.
| A．abrupt | B．changeable | C．suitable | D．typical |
–Did you enjoy yourself yesterday?
--Yes. As you saw, ____ party went on in ____ most pleasant atmosphere.
| A．the, a | B．the, the | C．a, the | D．a, a |
— Sorry, I made a mistake again.
— _______. As long as you practice more, you’ll succeed one day.
| A．Never mind | B．Certainly not | C．Out of the question | D．Don’t mention it |
Madame Curie is believed _______ radium.
| A．discovering | B．having discovered | C．to have discovered | D．to discover |