As _________ teacher, you must believe that you can make ______ difference to the lives of your students.
| A．a; 不填 | B．a; a | C．不填; 不填 | D．不填; a |
An American plane is reported ____ in the Atlantic Ocean with 228 people aboard, the airline’s worst disaster in its 75-year history.
| A．to have crashed | B．to have been crashed |
| C．having crashed | D．having been crashed |
Time should be made good use of ____ our lessons well.
| A．to learn | B．learning | C．learn | D．learnt |
— ____ you read the newspaper?
— Yes. I ____ it on the bus while I was on my way to work.
| A．Have; read | B．Did; read | C．Have; have read | D．Did; have read |
We ____ on this project for four hours. Let’s have a rest.
| A．are working | B．have been working | C．worked | D．had worked |
Internet shopping is really ____ when people are sure of its safety.
| A．taking off | B．taking up | C．setting up | D．setting off |