1、As a single mother on____welfare,she overcome difficulties and achieved_____success in the end.
A.不填；不填 B.the;a C.a；不填 D.不填；a
2、-It's still not a subject we're going to discuss here.____?
-Okay.I got it.
A.Are you sure B.Is that clear C.Are you joking D.Is that okay