______ school playgrounds to the public makes exercise easier for the people in the community.
A.Open B.Opened C.Opening D.Have opened
______ you know how to sort the trash, why did you put it into the same bin?
A.Unless B.When C.Now that D.Even though
In the countryside, many left — behind children live with their grandparents and can only see their parents ______ in a year.
A.fortunately B.occasionally C.traditionally D.normally
Many people are so ______ to Tik Tok （抖音）that they can' t put down their phones.
A.known B.addicted C.friendly D.related
He plays a very important part in the team, so nobody can ______ him.
A.replace B.reduce C.review D.recognise
As we all know, there is a close ______ between diet and health.
A.connection B.evidence C.power D.belief
