—Where is Mr. Wang? —He ______ Beijing on vacation.A. has been to B. has gone to C. went to
He __________ when I go to see him.
Great changes __________ in China in the past few years.
My sister has learnt English _________.
Do you think that the bridge _________ in a year?
Great changes ________ in China since the People’s Republic of China _________ in 1949.