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 |
One day I a newspaper article about one in six European mammal species threatened with extinction.
| A．came at | B．came across | C．came about | D．came after |
We can catch sight of millions of stars in space.
| A．/, the | B．the, / | C．/, / | D．a , the |
第一节：单项填空（共15小题；每小题１分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
--- How long are you staying?
--- I don’t know. .
A. That’s OK. B. It depends. C. I am going. D. It’s doesn’t matter.
In China, a number of peopleEnglish now, and the numbergrowing year after year.
| A．studies, is | B．are studying, is | C．is studying, is | D．is studying, are |
the dinosaurs disappeared still remains a mystery.
| A．whether | B．that | C．if | D．Why |