In communication, a smile is usually _____ strong sign of a friendly and _____ open attitude.(2011 .重庆)
| A．the;/ |
| B．a;an |
| C．a;/ |
| D．the; an |
I regret ______ that we have no news for you.
| A．to say | B．saying | C．to have said | D．having said |
When he saw a little boy ______ in the river, he took off his shirt and jumped into the water.
| A．struggles | B．struggling | C．to struggle | D．struggle |
—What do you think of the book?
—Oh, excellent. It’ s worth ______ a second time.
| A．to read | B．to be read | C．reading | D．being read |
Don’t ________ women. They are as important as men for the development of society.
| A．look up to | B．look down upon | C．look out for | D．look forward to |
It is the years we spent together at college ________ have a deep effect on my life.
| A．which | B．that | C．when | D．where |