Nearly four hundred supermarkets in Beijing are preparing to dim(使暗淡) their lights ________ the "Earth Hour 2010" on Saturday night．
| A．honor | B．honoring | C．to honor | D．having honored |
--- Has your father returned from Africa yet?
--- Yes, but he here for only three days before his company sent him to Australia.
| A．was | B．has been | C．will be | D．would be |
There are varieties of programs in the TV station to many different types of interests and tastes among the public.
| A．cater to | B．appeal to | C．apply to | D．adjust to |
The idea for the new plan came to his mind, to his experiment in the lab.
| A．while devoting | B．while devoting himself |
| C．while he was devoted | D．while devoted |
It shocked us all that little boy hadn’t been separated from that patient, he would have been infected with H1N1.
| A．if that | B．that if | C．if | D．that |
--- Where did you meet him for the first time?
--- Maybe it is in the museum we listened to the lecture we got to know each other.
| A．that; that | B．where; that | C．which; that | D．that; which |