—How many women doctors are there in your hospital?—______ them ______ over twenty.A.A number of; areB.The number of; areC.The number of; is
--When ___________ your brother ___________ his hometown? ---He ____________ for nearly three years.
---I think communication by email is better and much easier. Do you think so? ---__________ I agree with you.
How _______ it is to feel the roller coaster _______ at full speed!
Don’t get off the bus __________ it stops.
James used _____ on the right in China, but he soon got used______ on the left in England.