---Wow! These inventions are amazing．
—They were all invented _______years ago.
A．hundredB．hundredsC．hundred of D．hundreds of
D

試題分析：英語(yǔ)中數(shù)詞表示概數(shù)時(shí)，后面加s，和介詞of搭配使用。用原形時(shí)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�！麄兪嵌嗄暌郧鞍l(fā)明的。結(jié)合語(yǔ)境可知下文表示概數(shù)，故選D。
點(diǎn)評(píng)：英語(yǔ)中關(guān)于hundred、thousand和million三個(gè)數(shù)詞的用法只需要記住一個(gè)原則就行。即；前有數(shù)詞則不加s，加s必加of。
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