–What do you think of teaching, Bob?–I find it fun and challenging. It is a job ___ you are doing something serious but interesting.
The whole town __________ by the flood after it has been raining for 3 days nonstop.
-Alvin, are you coming with us? -I'd love to, but something unexpected __________.
-May I open the window to let in some fresh air?
Many of them turned a deaf ear to his advice,__________ they knew it to be valuable.
I can __________ the house being untidy, but I hate it if it's not clean.