The first use of atomic weapons was in 1945, and their power ____increased enormously ever since.

I, who, ________your classmate, will support you forever.

．The young often＿＿＿the old in our town．

Every hour and every minute ______precious to us because only six months are left for us to prepare for the college entrance examinations.

The teacher as well as the students who _____ fond of football, _____ playing together.