China is now the second largest economy in the world in terms ______ GDP. (Fill in the blanks with the correct prepositions or adverbs.)
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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.)
My grandfather are used______ living in the countryside. (Fill in the blanks with the correct prepositions or adverbs.)