There is no need to add in trees to create shade because many town and city gardens are __________ shaded by buildings.

The incomes of skilled workers went up.________，unskilled workers saw their earnings fall.

He was __ twenty when he was gone.

---- Have you finished your experiment report, Jane?----- Oh, my God. I’ve _______ forgotten all about that.

I’m worn out,____,the bike doesn’t work well,___ I can’t go further.