Betty_____ Shanghai in a few days, perhaps next Sunday. Do you know when the earliest plane ____ on Sundays?
| A．leaves; is taking off | B．leaves; takes off |
| C．is leaving; is taking off | D．is leaving; takes off |
It was obvious that the Climate Change Conference in Copenhagen______the global environmental problems.
| A．aimed on | B．focused on |
| C．intended for | D．commented on |
The students all wear the same uniform,so it’s hard for me to ________my son among them.
| A．bring out | B．pick out | C．pick up | D．break out. |
Not recognizing me at first, __________.
| A．he closed the door | B．the door was closed |
| C．the door was close | D．I closed the door |
She was always _____ , even when things were at their worst.
| A．attractive | B．optimistic | C．pessimistic | D．frightened |
This also keeps the air，soil，water crops________ chemicals.
| A．out of | B．out from | C．free of | D．rid of |