问题
选择题
—Liu Qian is good at doing the tricks with the cards.
—Yes, but if you watch carefully, you can see _______he does them.
A．who
B．what
C．which
D．how
答案
答案：D
题目分析：句意：刘谦擅长用卡片做魔术。是的，但是如果你仔细观察，你能看到他是怎么做的。根据从句的句子的结构，可知缺少方式状语，故选D。怎样。