must have been a large number oftourists in Sanya during the past Spring Festival, __________

Tu Youyou was given the Nobel Prize in Physiology or Medicine of 2015 due to her ________ to discovering a new drug to treat parasitic diseases.

is getting older and older, perhapsinto his second , playing with hisgrandson’s toy trains all day long.

— Hi! John, would you like to play football with us? — Oh,I can’t. I ___ my lesson all the morning and still need half an hour. [ ]

I want to buy a car for my father, buthaven’t found he likesyet.