单选题 Computers now have been introduced ______.

A、 in most secondary schools
B、 in all secondary schools
C、 in most primary schools, at half- price
D、 in most schools, at no expense to the taxpayer

【正确答案】 A

【答案解析】[精解] 本题是细节问题，要求回答计算机已经在什么范围内得到使用。根据文中第10行"Virtually every secondary school has been provided with at least one computer．．．”中virtually every(几乎每一个，但不是全部)的意思，可以确定正确答案为[A]。