Old  Richard,        ill so long ,is losing his memory and needs to be attended to．

Russia’s president fires senior military officers for failing to stop a naval base _________ by wildfires that have killed 48.

Each of the students in No.1 High School, Quanzhou works hard at his or her lessons, ____  to go to university some day.

I regret ______ that we have no news for you.

 ______ to computer games, the boy began to dislike school, which made his parents worried.