happy; cheerful (adj.) = (a)  

increase (v.) = (a)  

food that hasn't been preserved (n phr.) = (a)  

time between events (n.) = (a)  

important; necessary (adj.) = (a)  

decrease the effect of (phr.) = (a)  

adjustable (adj.) = (a)  

take something in (v.) = (a)  

doze off; fall asleep (v phr.) = (a)  

another choice (n.) = (a)  

Exercise is supposed to speed up your (a)   .

He knocked on the door and after a brief (a)   it was opened.

The course books are (a)   by e-books online as well.

Have an apple - it'll (a)    your hunger.

This area has become a heaven for people tired of the (a)   pace of city life.

The number of thefts in this country is  (a)    again.

There must be an (a)   to people sleeping on the streets.

You should avoid travelling right after covid. It's unsafe and the prices will reach a (a)   .

Our lungs play a (a)   role in breathing so avoid catching Covid at all costs.

After that tired evening, we sat and (a)   in front of the TV. We didn't even turn off the TV.