【正确答案】 B

【答案解析】[理由] 空格前的so为副词，表“如此地”，之后须接形容词或副词以供修饰，不得与名词连用。
[例] He is a so nice man that I like him.
(×)
→He is so(副) nice(形) that I like him.(√)
(他人很好所以我喜欢他。)
He studied so(副) hard(副) that he passed the test.(√)
(他很用功所以考试及格了。)
若须与名词连用时，so应改为such。such是形容词，表“如此的”，可与单数、复数可数名词或不可数名词连用。故下列句子均为正确：
[例] She's such a good girl(单数名词) that we all like her.
(她是一个如此好的女孩子，因此我们都喜欢她。)
They are such good students(复数名词) that the teacher likes them very much.
(他们是很好的学生，因此老师很喜欢他们。)
Its such good music(不可数名词) that I enjoy it very much.
(这音乐太棒了，我很喜欢。)
若so须与名词连用时，仅能与含有形容词的单数可数名词连用。so之后须先置形容词，接着接不定冠词a/an，最后再接单数可数名词，形成下列固定用法：
so+adj.+a/an+单数可数名词 如此的一个……
[例] He is so nice a man that we all like him.
=He is such a nice man that we all like him.
(他是这么好的一个人，因此我们都喜欢他。)
She is so beautiful a girl that we are crazy about her.
=She is such a beautiful girl that we are crazy about her.
(她那么美，因此我们都为她疯狂。)
[注意]
若so要与不可数名词或复数名词连用时，之后须先置little或much，再置不可数名词；或须先置few或many再置复数名词。
[例] With so little time left, I don't think I can finish the job.
(所剩时间无几，因此我认为这个工作我可能做不完。)
I have so much work to do tonight.
(我今晚有很多工作要做。)
He has so many friends that he seldom has time for his girlfriend.
(他的朋友太多了，以致于他没什么时间陪女朋友。)
根据上述，空格应置little(很少的)，修饰不可数名词time，合乎语意及用法，故(B)应为正选。
若选(A)时，原句应改为：
Since we have such a short time left...
由于我们的时间所剩不多，……