Imperative

(a)   at home as much as possible.

(a)   go out with friends these days to prevent from catching COVID-19.

It's going to rain. (a)   your umbrella along.

Please don't (a)   to keep our environment clean.

(a)   a face mask when going out these days to prevent from catching COVID-19.

(a)   your hands more.

(a)   more water every day.

Don't (a)   too much food at the supermarket at a time.

(a)   careful when using the Internet.

(a)   be too worried about COVID-19.