7.It took the students half an hour to clean the classroom after school.(保持句意基本不變)
The studentsspent half an hourcleaning the classroom after school.

分析 --放學后學生們花了半個小時打掃教室.
--學生們放學后花了半個小時打掃教室.

解答 答案:spent;cleaning.考查同義句.It takes sb.+時間+to do sth.做某事花了某人多少時間.可以表達為sb spend time (in) doing sth..某人花時間做某事.由took過去式,可知,是一般過去時態(tài),因此spend變?yōu)檫^去式spent花費.clean打掃,動名詞是cleaning.答案是spent;cleaning.

點評 同義句轉換最基本的是要保持原意不變,在理解語境的基礎上,抓住關鍵單詞或詞組,運用相同詞意的單詞或詞組完成試題.

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