I like novels written by J. K. Rowling. So far I ________all her works about Harry Potter.
A.have read B.read C.am reading
He looks worried. I wonder ________ he has already known about the result.
A.where B.whether C.why
—What do you think of the basketball match between Liaoning and Guangdong？
— ________
A.Wonderful！ B.I think so. C.No problem.
We were not good friends ________we saw each other, but gradually, we got along better and better.
A.until B.when C.if
My sister has gone to work in Beijing, not for money, but ________ herself.
A.improve B.improved C.to improve
I hear that it often ________ in Sichuan and there are usually floods, especially in summer.
A.rains B.rained C.will rain
