There are more than 740 million Chinese _______ to second-hand smoking in public places now.
| A．are being exposed | B．exposed |
| C．to expose | D．having been exposed |
We agreed to accept ________ they thought was the best professor in the college.
| A．whatever | B．whomever | C．whichever | D．whoever |
I don’t know who invented ________ telephone. It’s really ________ most useful invention.
| A．the; a | B．/; a | C．a; the | D．/; the |
In hot weather, an old tyre can break again easily it’s mended.
| A．when | B．where | C．which | D．that |
____ he grows up can he understand your intentions.
| A．Unless | B．Once | C．Only when | D．Ever since |
She is not very ____ about the idea of going camping. I think she will stay at home reading.
| A．optimistic | B．enthusiastic | C．confused | D．curious |