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About _______of the engineers in my company seem to be in their _________．
A．second-nines; fourtiesB．two-ninths; forties
C．second-ninths; fortiethD．two-nineths; fourtieth
B

試題分析：句意：我公司的大約九分之二的工程師好像都在四十多歲。分數(shù)的表達法是：分子用基數(shù)詞，分母用序數(shù)詞，分子超過1，序數(shù)詞要加s。表示在大約幾十歲，要將后綴ty變成ties 。故選B
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