• 2022-05-31
    Being more prompt and reliable, e-mails have _____(替代) for hand-written letters today.
    A: constituted
    B: resisted
    C: substituted
    D: obstruct
  • C

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      I have four letters to write today and I have finished_________. A: ones B: the three C: three D: /

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      2. In production cheaper materials are being __ for the better, more expensive kind. A: discarded B: replaced C: converted D: substituted

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      In manufacturing, cheaper materials are constantly being ______ for the better and more expensive kind. A: replaced B: transformed C: displaced D: substituted

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      One or perhaps more plays _______by the playwright. A: has been written B: are written C: is written D: have been written

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      The first textbook ­­______ for teaching English as a foreign language came out in the 16th century. A: have written B: to be written C: being written D: written