Whales are living ___________. A. in sea B. in the sea C. on the land
Have you determined ___________?
---Can I help you?---Yes, I bought this radio here yesterday, but it _____________.
He looked very confident and calm during the test, but __________ he was extremely nervous.
It was a cold winter night, and there wasn’t anyone __________the boy could turn for help in the street.
___________for his good skill, this doctor has a lot of visitors calling for help all the time.