Green economy offers a new model _____ people could both protect the climate and develop the economy, according to what Li said at the International Conference.
| A．that | B．why | C．where | D．which |
—Is Bob still a volunteer?
—No, but he _____. He worked for the 2008 Beijing Olympic Games.
| A．used to | B．used to be |
| C．used to do | D．was used to |
You’d better _______ because I’m busy writing a letter to my parents.
| A．leave me alone | B．leave me behind |
| C．set me aside | D．set me off |
Last month we students all had some great speeches. The headmaster together with some other teachers __________ to attend it, too.
| A．were invited | B．was invited |
| C．has invited | D．invited |
---Is Johnson on duty today?
---It ________ be him, but I’m not sure.
| A．will | B．may |
| C．need | D．must |
Mary’s mother told her daughter not to spend too much time surfing the Internet, but ______ didn’t help.
| A．this | B．that | C．it | D．which |