---Wow! These inventions are amazing．
—They were all invented _______years ago.


  1. A.
    hundred
  2. B.
    hundreds
  3. C.
    hundred of
  4. D.
    hundreds of
D
試題分析：英語中數(shù)詞表示概數(shù)時，后面加s，和介詞of搭配使用。用原形時表示具體數(shù)字和數(shù)詞搭配使用。句意：喔，這些發(fā)明太神奇了。——他們是多年以前發(fā)明的。結(jié)合語境可知下文表示概數(shù)，故選D。
考點(diǎn)：數(shù)詞用法
點(diǎn)評：英語中關(guān)于hundred、thousand和million三個數(shù)詞的用法只需要記住一個原則就行。即；前有數(shù)詞則不加s，加s必加of。
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