The factory ________ for more than ten years.
| A．open | B．opened | C．has been open | D．was opened |
____ useful the computer is!
| A．What a | B．What an |
| C．How | D．How a |
Do you remember what ____ at 11:00a.m yesterday?
| A．were you doing | B．you were doing |
| C．are you doing | D．you are doing |
When Tom got to my house, my family ___ dinner.
| A．were having | B．was having |
| C．is having | D．are having |
If you don't go, I _______, ______.
| A．do, too | B．don’t, either |
| C．don’t, too | D．won’t , either |
I think children today are ____.
| A．busy enough | B．enough busy |
| C．too much busy | D．under a pressure |