The students who are not ____with the progress they have made in the study will have greater progress.
(A) proud (B) content
2.
What's the language ____ in Germany
(C) be spoken (D) to speak (E) spoken
3.
If ______,we will continue our experiment after office hours.
(F) it being necessary (G) necessary
三道题目选项采用连续字母,并请说明每一道题目的解答思考过程,