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Hebecameafamouswriterwhenhewas

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問題詳情:

Hebecameafamouswriterwhenhewas

He became a famous writer when he was ______ .

          his fifty           his fifties                 fifty years old          fifties

【回答】

B  表示具體的歲數時,可用at+基數詞或者at the age of+基數詞。表示某個年齡段時,要用in one’s+基數詞的複數形式。故選B。

知識點:介詞和介詞短語

題型:選擇題

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