摘要：5．In the library, we can't talk l ．
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Of all the inventions, what do you think is ________ invention in the 21st century．
- A.the most helpful
- B.more helpful
- C.helpful
- D.more and more helpful
My grandma _______ the life in the city in the first two weeks.
- A.didn’t use to
- B.isn’t used to
- C.wasn’t used to
- D.doesn’t use to
There are ________ people in the street.
- A.much too
- B.many too
- C.too many
- D.a lot of too many