in the computer shop the shop assistant gave us introduction about this new kind of computer
问题描述：
in the computer shop the shop assistant gave us introduction about this new kind of computer
A a B an C the D \ 为什么选b
in the computer shop the shop assistant gave us——- introduction about this new kind of computer
答
选B
introduction是可数名词 前面要用冠词
由于是元音字母开头所以用an
意思是给了我们【一个】指示