问题
选择题
_________difficult questions the teacher is asking! Only a few students can answer them!
A．What a
B．How a
C．What
D．How
答案
C
题目分析：感叹句一般有两种结构：what +(a/an)+形容词+名词+主语+谓语！名词是复数或不可数名词，不加a/an.how+形容词+主语+谓语！根据questions是名词复数，故选C。