--_________is the population of the world ? --_________about 7 billion.A. How many; It’s B. What; It’s C. What; They’re
—— Is Jack back? —— No, but I think he ______ in half an hour.
He often talks ______ but does ______. People like him.
On ______ sides of the streets are a lot of colorful flowers.
—— Do you think there will be robots in school?—— .
There ______ a basketball match between Class One and Class Three this afternoon.