---Lucy, is maths difficult to learn in a foreign school?---I’m not sure, but no subject can be learned well __________hard work.
It seems that the aged people _________ the H7N9 more easily from the recent cases.
---I’m very sorry. I broke your tea cup. ---________.
---Is Kate serious? ---I _________. She never means it.
---Morning, class. Is _________ here? ---No, sir. Tom is absent.
---Is the child any better today?---I think so. His temperature seems _________ now.