
Present Perfect Continuous
Authored by ANA ORTEGA
English
University
Used 25+ times

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10 questions
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1.
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30 sec • 1 pt
He (explore) the ocean many years.
2.
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30 sec • 1 pt
Lately, he (work) with space scientists.
3.
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30 sec • 1 pt
Lonnie Thompson (study) glaciers over 40 years.
4.
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30 sec • 1 pt
He (learn) a lot about the past.
5.
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30 sec • 1 pt
For many years, the glaciers (melt).
6.
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30 sec • 1 pt
The Wallenda family (perform) risky activities
7.
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30 sec • 1 pt
Scientists (learn) more and more about how brain chemicals affect risk.
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