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  1. Offroad's Avatar
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      • Native Language:
      • Brazilian Portuguese
      • Home Country:
      • Brazil
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      • Brazil

    • Join Date: Feb 2008
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    #1

    on, in, upon, under, at

    Dear teachers...

    Please... Which ones are correct grammatically?

    The reactions took place _____________ the temperatures of 300 and 350 K.

    a) on
    b) in
    c) upon
    d) under
    e) at

    I go for a), which is 'on'.

    Many thanks

    • Member Info
      • Native Language:
      • English
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      • United States
      • Current Location:
      • United States

    • Join Date: Mar 2009
    • Posts: 3,505
    #2

    Re: on, in, upon, under, at

    Quote Originally Posted by Offroad View Post
    Dear teachers...

    Please... Which ones are correct grammatically?

    The reactions took place _____________ the temperatures of 300 and 350 K.

    a) on
    b) in
    c) upon
    d) under
    e) at

    I go for a), which is 'on'.

    Many thanks
    I would use "at" and probably delete "the"(AmE).

    • Member Info
      • Native Language:
      • American English
      • Home Country:
      • United States
      • Current Location:
      • United States

    • Join Date: Apr 2009
    • Posts: 12,310
    #3

    Re: on, in, upon, under, at

    "At"

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