Who, as a black conductor, made the greatest contribution to black slaves' escape？
A. Quakers.
B. W. H. Siebert.
C. Harrit Tubman.
D. Unclear.
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This passage mainly talks about things in ______.
A. old imperial Japan
B. war-time Japan
C. modern Japan
D. future Japan
The underlined sentence ''Odds are good someone may have one sitting in their basement collecting dust" is closest in meaning to that______.
A. it's very strange that someone should have one sitting in their basement collecting dust
B. chances are that what you want is just lying idle in your neighbor's house
C. you are fortunate that someone kind will collect dust in your basement
D. it's likely that someone may be waiting for you in his basement
The first paragraph is engaged in ______.
A. describing several world famous cities in developing countries
B. illustrating the seriousness of environmental problems in developing countries
C. drawing a picture about the seriously polluted future world
D. comparing the pollution problems in developed and developing countries
What is the most suitable title for this passage？
A. Freecycle Means Free Stuff and a Cleaner Environment.
B. A Very Useful Website.
C. A Good Way to Give and Get.
D. Freecycle Intends to Avoid Cabbage.
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