DID THE TEACHER EXPLAIN HOW ... THIS PROBLEM

793. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN 793. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

793. Did the teacher explain how ... this problem?

A. do we solve

B. can we solve

C. to solve

D. solve