. Professor Smith and Professor Brown will _____ in giving the class lectures.
| A．exchange | B．alter | C．shift | D．alternate |
When I got back home I saw a message pinned to the door ____’’Sorry to miss you; will call later.’’
| A．reading | B．reads | C．to read | D．read |
When the dog attacked me, I _________ myself with a stick.
| A．prevented | B．supported | C．rescued | D．defended |
Most of the artists ______ to the party were from South Africa.
| A．to be invited | B．invited | C．being invited | D．had been invited |
I was just talking to Margot when Jackson ____.
| A．cut in | B．cut down | C．cut off | D．cut up |
This picture was taken a long time ago. I wonder if you can ________ my father.
| A．find out | B．look out | C．speak out | D．pick out |