— Now that you like the computer so much, why not buy one?— Well, I can’t afford computer

— Now that you like the computer so much, why not buy one?
— Well, I can’t afford computer at present.
A. that expensive a
B. a such cheap
C. a so cheap
D. that an expensive

(答案→)A. that expensive aB. a such cheap C. a so cheapD. that an expensive解析： 考察副词用法。本句中的that是一个副词，相当于so ,such. That expensive a computer= such an expensive computer。如此昂贵的电脑。句意：既然你很喜欢电脑，为什么不买一台呢？—我现在可买不起如此昂贵的电脑啊！故A正确。

和我的回答一样，看来我也对了