14．至今，145個(gè)國(guó)家參加了2015意大利米蘭世博會(huì)．
So far，145 countrieshave taken part in the 2015 World Expo in Milan，Italy．

分析 have taken part in

解答 答案：have taken part in．結(jié)合句意參加這個(gè)動(dòng)作發(fā)生在過(guò)去，一直持續(xù)到現(xiàn)在，so far 至今，故用現(xiàn)在完成時(shí)have/has+過(guò)去分詞，主語(yǔ)是countries復(fù)數(shù)，故have，參加并成為其中一員take part in，take的過(guò)去分詞taken，故答案是have taken part in

點(diǎn)評(píng) 現(xiàn)在完成時(shí)表示過(guò)去發(fā)生的動(dòng)作對(duì)現(xiàn)在造成的影響或結(jié)果或表示過(guò)去的動(dòng)作或狀態(tài)持續(xù)到現(xiàn)在．

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