A number of tests have been conducted to _________ that these drugs have no side effects.
| A．find out | B．look for | C．make sure | D．work out |
When she was crossing the room the nurse happened to notice the old lady_________to get out of bed.
| A．tried | B．trying |
| C．to try | D．had tried |
He’ll be very upset if you_________his offer of help.
| A．turn off | B．turn out |
| C．turn over | D．turn down |
.—Have you moved into the new house?
—No,the building is_________ construction.
| A．at | B．under | C．for | D．in |
—How about your sister’s studies?
—Oh,she is_________ very well in her studies.
| A．feeling | B．getting |
| C．doing | D．becoming |
It_________ to me that I should pay a visit to my friend Jane.
| A．happened | B．supposed |
| C．proved | D．occurred |