Though he’s only 8 years old, he can read _______ on science.
---You never have sweet snacks, do you?---________. Though I know they’re bad for our health.
He was often seen _________ with charity work last year.
Please don't stand up in class until you .
– Can a plane fly _______ the Atlantic Ocean?--Yes, but it needs to go _______ the clouds for hours.
The man is very ill and he has _______.