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They use computers to keep the traffic ______ smoothly. 

   A. being run      B. run          C. to run         D. running

D

解析:考查非谓语动词Ving,这儿构成(keep sth. doing。)

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British English and American English are almost the same. But there are slight differences between British and American English in vocabulary, pronunciation, spelling and grammar.
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The third difference is very small. This is the difference in spelling. A few types of words are spelled differently in British and American English. The most common example is in a word like “center”. In British English, this word would be spelled C-E-N-T-R-E, while in American English the same word would be spelled C-E-N-T-E-R. Another example is “or” vs “our”. The word “color”is spelled C-O-L-O-U-R in Britain but C-O-L-O-R in the US.
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【小题1】What is this passage mainly about?

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B.Differences between British and American English
C.The influences of British English on American English
D.The causes of the differences between British and American English
【小题2】What does the underlined word “disparately” in Paragraph 2 mean?
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【小题3】According to Paragraph 3, Americans and the British may find it hard to understand each other because of       .
A.the different ways of using vowels
B.the different idiomatic expressions they use
C.the differences in grammar
D.the differences in spelling
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a. flavour    b. theater   c. humor   d. centre   e. kilometer   f. honour     g. color
A.abceB.bcdeC.bcegD.defg
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E

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