seven    person    pronounce    high   valuable

(1) 

Time is          thing in the world because time never goes back.

(2) 

It is not polite to ask a stranger questions about his         life.

(3) 

Peter and his wife live on the           floor and they go up and down by lift.

(4) 

Many countries speak          of China's high-speed railway technologies.

(5) 

Do you known the word“either”has two         ?

【考点】最高级，形容词，派生法，序数词，副词，可数名词及其单复数

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