With WH-words:
(1)-I'm going to Beijing this weekend. - ____ for?(2)____ come he's failed in the exam? -He's been absent from class for a whole month.
【正确答案】：What;How
【题目解析】：【考点点击】本题考查疑问词。【要点透析】 What for询问原因,相当于why; How come意为“为什么,怎么会”,也相当于why,但以 How come开头的问句仍是陈述句的语序。
