It is not doing the things we like, but liking the things we have to do ______ makes life happy.
David is a great teammate. He knows well how to work with ________.
I was about to walk over to Tom’ s seat when he ________ and left.
Please do not feed the fish; they ________ die if they eat too much.
The 16th Asian Games started ________ November 12 th, 2010 in Guangzhou.
David wants to be ________ engineer while Cathy wants to be ________ doctor.