快帮忙！！！！！！！！~~~~~~~()wehavefinish
( )we have finish our work,let us take a rest。 我填的是as，但正确答案是now that。我觉得句意都通啊。请问为什么不能用？
now that 既然 as做因为解释时一般不放句首.如I must stop writing, as I have a lot of work to do.