65. Wit a large amount of work _______, the chief manager couldn’t spare time for a holiday.
| A．remained to be done | B．remaining to be done |
| C．remained being done | D．remaining to do |
—I wonder if you could go with me to the supermarket.
—Sorry. I _______ my experiment report all the morning and haven’t finished yet.
| A．write | B．was writing |
| C．have written | D．have been writing |
_______ a small number of Australians are bitten by spiders each year, most recover without any medical treatment.
| A．While | B．Unless | C．When | D．Because |
This morning I saw an old friend of mine in the street by ______.
| A．event | B．accident | C．affair | D．matter |
Everyone should _______________ the environment.
| A．make a contribution to protect | B．make contribution to protecting |
| C．contribute in protecting | D．make contributions to protecting |
—Listen, Lily is playing the piano!
—Wow, how sweet the music ______!
| A．is heard | B．hears | C．is sounding | D．sounds |