问题补充：
— I have trouble my new computer.
— Don’t worry. I will show you .
A. to use, how to use
B. to use, what to use
C. using, what to use it
D. using, how to use it
答案：
A. to use, how to use
B. to use, what to use
C. using, what to use it
(答案→)D. using, how to use it
解析：
试题分析: 句意:我不太会用我的新电脑，别担心，我会示范给你看怎么用。Have trouble doing sth做某事有困难；再次提及上文的事情可用it指代；根据语境可知是示范如何使用电脑，how+不定式，故答案选D.
