Mandela met a lot of difficulties, he still fought for the equal rights of his people.
| A．Unless | B．Since |
| C．Even if | D．As if |
_________ for his good skill,this doctor has a lot of visitors calling for help all the time.
| A．Knowing | B．To know |
| C．Known | D．To have known |
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 |