You can cut the birthday cake________this knife．


  1. A.
    by
  2. B.
    in
  3. C.
    with
  4. D.
    use
C
分析：用……工具，介詞用with．(延伸)可以改為You can use this knife to cut the birthday cake．＝You can cut the birthday cake by using this knife．
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　　Call the police immediately if there is an accident in the street.

　　Send or receive e-mail.

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　　Send and receive messages.

　　Sending short written messages is a popular way to use your mobile phone. Many people use short forms of words, so the messages are quick to write and read. Can you guess what these messages mean? Try reading them out. What do you hear?

　　RUOK?

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