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He was about to tell me the secret _________ someone patted him on the shoulder.

   A. as            B. until                C. while                D. when

 

【答案】

D

【解析】考查固定結(jié)構(gòu)。Be about to do sth when…正要做某事在這時出現(xiàn)了意料之外的事情。句意：他正要告訴我那個秘密在這時有人拍了他的肩膀。

 

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When we donate（捐獻(xiàn)）blood, a small amount is usually taken in advance for at least ABO and Rh systems typing. If you are O+, the O is your ABO type and the + is your Rh type. It is possible to be A, B, AB, or O as well as Rh + or Rh-.

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