1．It was two months before the young manmastered （master） the skill of running the machine introduced from Germany．

分析 過了兩個(gè)月這位年輕人才掌握了操作引進(jìn)自德國(guó)的機(jī)器的技能．

解答 答案：mastered
解析：根據(jù)題干提示可知，本題考查：it is/was+一段時(shí)間+before"過了一段時(shí)間才…"這一固定句型．在該句型中從句的時(shí)態(tài)與主句保持一致，故根據(jù)括號(hào)內(nèi)所給提示可知本題答案為mastered一詞．

點(diǎn)評(píng) 本題考查單詞填空，做此類題目時(shí)一定要從語法、句意、固定搭配、時(shí)態(tài)等各個(gè)方面仔細(xì)分析題干；再結(jié)合所給提示確定最終答案．

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