Professor Smith, along with his assistants, on the project day and night to meet the deadline.
| A．work | B．working |
| C．is working | D．are working |
I don't think the experiment is _____ failure. At least we have got _____ experience for our
future work on _____ nature.
| A．/; /; / | B．a; /; the | C．a; /; / | D．/; the; / |
.He is really an excellent doctor and he is _____ to becoming an expert in this field.
| A．in a way | B．by the way | C．on the way | D．under the way |
The boy student is poor in health now; his parents wish that his health _____when he grows up
| A．can improve | B．could improve |
| C．can be improved | D．could be improving |
Don’t enter the office unless _______.
| A．you have told to | B．told to | C．telling | D．you are told |
Can you find a sentence situation _______ this phrase can be used?
A. where B
. when C. which D. that