Question

We’ll have to finish it , _____________

1. A.
   however it takes long
2. B.
   however long it takes
3. C.
   no matter how it takes
4. D.
   no matter how long does it take

Answer 1

B
解析：
状语从句考查题。However连接状语从句时其后紧接形容词或副词，而且从句要用陈述语气。 无论需要多长时间我们必须完成它。 选B