—Linda, how can I keep fit?—Well, ______ apple a day keeps ______ doctor away.
The book Expo(书博会) ______ in September this year. It encouraged people to read.A. is held B. was held C. will be held
---______ can we warn people not to swim here?---By putting up signs.A. How B. Why C. Where
---I saw the 3D printer print some cartoon characters at the science fair.---Sounds fun! I believe such technology will be ______ used in many waysA.widely B. difficultly C. clearly
Remember not to ask ______ questions, like the age, when you talk with an American. A. historical B. lifelong C. private
To the heavy traffic,1 have to leave so early. A.increase B.avoid C.spread