the last three decades, the number of people participating in physical fitness programs ______sharply.

You should have given me a ring before youleft.—I meant______, but I was in a hurry thattime.

Have you heard of the school bus accidentrecently—–Yes. thevictims was over 20 and most of them died.

No one could ____________the fact that he has behaved in a most extraordinary way recently.

_______ do you want to join the chess club—Because I like chess much.