I don't think you can work out the maths problem________ theteacher's help.A．sinceB．unlessC．becauseD．without【精析与答案】 D选B为什么不行

I don't think you can work out the maths problem________ theteacher's help.A．sinceB．unlessC．becauseD．without【精析与答案】 D选B为什么不行
I don't think you can work out the maths problem________ the
teacher's help.
A．since
B．unless
C．because
D．without
【精析与答案】 D选B为什么不行

I don't think you can work out the maths problem________ theteacher's help.A．sinceB．unlessC．becauseD．without【精析与答案】 D选B为什么不行
该句意为我不信你能在没有老师帮助下做出这题.跟据汉语意思此处填without,若填unless,则意为我不信你能做出这题除非老师的帮助,意思不附和题意.

unless是指除非，有条件意味。而without是指没有...的话。

D

unless 后面应该跟从句。