18．It will take them about five years to build the high-speed railway．（改為同義句）
   They willspendabout five years inbuildingthe high-speed railway．

分析 他們花了大約五年去建造高速路．

解答 答案：spend； building．上文是it takes sb+時間+to do sth 某人花時間做某事，這里是一般將來時，結(jié)合下文in用spend+時間+in doing sth，故答案是spend； building

點(diǎn)評 同義句轉(zhuǎn)換主要是考查對句型的活用，同一個內(nèi)容多種形式表達(dá)的能力．在做題時要注意，①應(yīng)弄清楚所給句子的內(nèi)容和句式結(jié)構(gòu)，試題填空部分與原句的對應(yīng)關(guān)系，表達(dá)形式．②根據(jù)所給空位，確定同義的句式和恰當(dāng)?shù)脑~語．③對特殊結(jié)構(gòu)的句型和習(xí)慣表達(dá)要仔細(xì)斟酌．

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