The great changes _______ have taken place _______ carrying out the economic reform in our country.

A. may not; unlessB. could not; without

C. never; but for D. would; besides

 

B

【解析】

試題分析：考查虛擬語氣。題中without相當(dāng)于if引導(dǎo)的條件虛擬語氣，與過去事實(shí)相反，故主句用could have done。句意：要不是在我們國(guó)家實(shí)施經(jīng)濟(jì)改革，不可能發(fā)生巨大的變化。故B正確。

考點(diǎn)：考查虛擬語氣

 

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