__________ around the fire, the tourists danced with the local people.
| A．Gather |
| B．To gather |
| C．Gathering |
| D．To be gathering |
I think you should complain __________,of course, you are happy with the way things are.
| A．if | B．unless | C．as | D．because |
._________in charge of the shopping center has upset him for quite some time.
| A．Left | B．Being left | C．Having left | D．To leave |
As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work．
| A．不填；不填 | B．不填; a | C．the ; a | D．the; the |
—Ring me at six tomorrow morning, will you?
—Why that early? I ______.
| A．will be sleeping | B．will sleep | C．have slept | D．have been sleeping |
-------Mary, the telephone is ringing!
---------______, but I am washing my hair.
| A．I’m sorry | B．You answer it | C．Hold on | D．That’s good |