People wrote letters to get in touch in the past. Nowadays email has       the way people communicate.

— How is your sister?— She _______ quite good after the operation, but she is taking a turn for the worse today.

Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute. 

The army officer _______ his men to fire as soon as the enemies came up.

A pilot climbed into the jet and off he ______, leaving the ground far behind.