Question

—Mona, _______ will it take to fly to Guangzhou?
—Sorry, I don’t know

1. A.
   how long
2. B.
   how soon
3. C.
   how far
4. D.
   how many

Answer 1

A
考查疑问词。how long 多长，多久；how soon多久之后会发生某事；how far距离多远；how many数目有多少。句子是问坐飞机到广州需要多长时间，所以选A。