--_________is the population of the world ? --_________about 7 billion.A. How many; It’s B. What; It’s C. What; They’re
–How clean your car is! --Thank you. It _____ very often.
Julie didn’t leave her office _____ the police arrived.
Jiefangbei is not far from Chaotianmen. You can easily visit _____ in a day.
You’d better take care, _____ you will hurt your eyes.
Helen loves reading. She has read _____ books this month.