How _______ his grandparents? - They're very well.A am B. wasC. is D. are
Beijing is bigger than _____in Jiangsu.
Is there _____ in the bag?
----How about going for a walk outside? -----_______.
Mr. Lin gave us some _____ how to learn English well last week.
----Can he work out the maths problem? ----I think _____ hard for him to work it out.