THE CHILDREN ARE PLAYING ... IN THE SCHOOLYARD. A. HAPPINESS B....

559. - 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

559. The children are playing ... in the schoolyard.

A. happiness B. happy

C. happily

D. happier