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