10．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

分析 我公司的大約九分之二的工程師好像都在四十多歲．

解答 答案：B．
根據(jù)About _______of the engineers，可知本部分考查分?jǐn)?shù)的表達(dá)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，所以九分之二表示成two-ninths．表示在大約幾十歲，一般用in the+數(shù)字（整十）的復(fù)數(shù)，要將后綴ty變成ties．故選B

點評 此題考查分?jǐn)?shù)的用法．做題時，要根據(jù)分?jǐn)?shù)的用法篩選出答案．

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