Question

--- How many of you have solved the math problem?
--- ________, the math problem is far too difficult for us to work out. .

A．All

B．None

C．Nobody

D．Everybody

Answer 1

B

试题分析：句意：---你们中有多少人已经解出了这道数学题呢？---没人，这道数学题对我们来说太难。四个选项中，只有none可以回答How many的提问，故选B。 
考点: 考查代词的用法。