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Present Perfect Continuos

Quiz by Heydy Ivon Reyes -

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5 questions
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  • Q1

    Estuaries ________ (receive) sediments and nutrients from rivers since the last flood

    are receiving

    have been receiving

    30s
  • Q2

    The open ocean ________ (absorb) carbon dioxide since the Industrial Revolution.

    has been absorbing

    is absorbing

    30s
  • Q3

    Marine lakes ________ (change) due to ocean currents since the last ice age.

    have changing

    have been changing

    30s
  • Q4

    Kelp forests ________ (develop) in cold and deep waters for centuries.

    have developing

    have been developing

    30s
  • Q5

    Coastal wetlands ________ (support) marine biodiversity since the creation of national parks.

    have supporting

    have been supporting

    30s

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