They always communicated with each other on the Internet, but they never met him _____________.

– What makes you so upset, Mr. Wang?– That John, a student in my class, ______ himself to computer games.

The managing director promised that he would _____ me as soon as he had any further information.

We        the problem for a long time, but we didn’t reach any agreement.

Dennis＿＿＿the warning and put his hand into  the lion’s cage.