The form cannot be signed by anyone yourself.
| A．rather than | B．other than | C．more than | D．better than |
_____ all the inventions have in common is ______ they have succeeded.
| A．What; what | B．That; what | C．What; that | D．That; that |
The new machine，if _________ properly，will work at least ten years.
| A．use | B．using | C．being used | D．used |
—What were you doing when the telephone rang?
—I ______ away my books and ______ to bed.
| A．had just put;was going | B．was just putting;went |
| C．just put;had gone | D．have just put;gone |
I thought Jim would say something about his school report,but he ______ it.
| A．doesn’t mention | B．hadn’t mentioned | C．didn’t mention | D．hasn’t mentioned |
We found______ impossible to finish the work on time.
| A．that | B．one | C．it | D．this |