问题补充:
---We can use QQ to communicate with each other online.
---Will you please show me?
A. which to use
B. how to use it
C. what to use
D. where to use it
答案:
A. which to use
(答案→)B. how to use it
C. what to use
D. where to use it
解析:which to use用哪一个;how to use it如何使用它;what to use有什么;where to use it在哪儿用它。句意:我们能够用QQ在线相互交流。——你能告诉我如何使用它吗?结合语境可知选B。