题目内容

Our machines are out of date. We need to replace them______ new ones. (Fill in the blanks with the correct prepositions or adverbs.)

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China is now the second largest economy in the world in terms ______ GDP. (Fill in the blanks with the correct prepositions or adverbs.)

Time is running______ . (Fill in the blanks with the correct prepositions or adverbs.)

Candles have given way ______ electric lights. (Fill in the blanks with the correct prepositions or adverbs.)

At a time like this,the selfish human instinct comes______ play. (Fill in the blanks with the correct prepositions or adverbs.)