In an economy ________income per head used to rise by barely 1% a year, current growth rates feel like a miracle.
| A．when | B．whose |
| C．that | D．where |
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 |
The firefighters would not allow anyone______ into the room on fire to collect anything.
| A．to go | B．going |
| C．gone | D．go |