单选题 I am afraid that I am not able to finish the task in ______ a short time. Could you help me, please?
A. so B. such C. this

【正确答案】 B
【答案解析】考查限定词。so是副词，只能修饰形容词，构成“so+形容词+a(n)+名词”结构,such是形容词，修饰名词，构成“such+a(n)+(形容词)+名词”结构。this是指示代词，其后不能跟不定冠词。