_television is more useful than _radio.A A,a B An,an C The,the D /,/
问题描述：
_television is more useful than _radio.A A,a B An,an C The,the D /,/
选什么?
_car was invented by a scientist,but _tea was found by accident.
A A,the B The,/ C /,a D The,the
答
A为什么不是C， a或the放在单数名词前都可以表示种类，区别是什么？英语中，指类别时应该用不定冠词加单数形式，或者是用复数形式（此时不要冠词）。