My father ________ in a shop, but he ________ there these days.

1. A.
   works; isn't working
2. B.
   is working; works
3. C.
   works; not works
4. D.
   is work; doesn't work

My father ________ in a shop, but he ________ there these days.

[　　]

A．works; isn't working

B．is working; works

C．works; not works

D．is work; doesn't work