--- Did you find the missing couple in the mountain yesterday?
--- No, but we _______ to get in touch with them ever since.
| A．have tried | B．had tried |
| C．have been trying | D．had been trying |
—How is your recent trip to Sichuan?
—I've never had ________one before.(2011·四川)
| A．a pleasant | B．a more pleasant |
| C．a most pleasant | D．the most pleasant |
Mr.Stevenson is great to work for ——I really couldn't ask for a ________ boss.( 2011·全国Ⅱ)
| A．better | B．good |
| C．best | D．still better |
Sarah pretended to be cheerful，________nothing about the argument.(2011·全国Ⅱ)
| A．says | B．said | C．to say | D．saying |
________ that they lost the game, tears came down Kate's face.
| A．On hearing the news |
| B．When heard the news |
| C．The moment she heard the news |
| D．While hearing the news |
________ the Internet is bridging the distance between people, it may also be
breaking some families or will cause other family problems.
| A．When | B．If | C．While | D．Since |