—How long have you been in this office?
—Just a few minutes.My cousins ________ here together with me.
| A．have walked | B．had walked |
| C．walked | D．have been walking |
It is not who is right but what is right ____ is of importance.
| A．which | B．it | C．that | D．this |
I _____ his telephone number. Had I known it, I would have rung him up.
| A．don’t known | B．didn’t know |
| C．hadn’t known | D．haven’t known |
--- Don’t look down upon Bob. He has his own advantages.
--- Oh, yes. ____ others are weak , he is strong.
| A．When | B．Where | C．While | D．If |
The new machine, as is reported in the local newspaper, will work twice as fast, _____ greatly reducing costs.
| A．thus | B．anyhow | C．yet | D．even |
Last month, part of Southeast Asia was struck by floods, from ___ effects some people are still suffering.
| A．that | B．whose | C．what | D．those |