Topics: Should, Should not have
I __________ ____________ the danger at the beginning. (realize)
A. realizes
B. shouldn’t have realized
C. should have realized
D. should has realized
Select your answer:

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Tenses › ViewI think humans … on Mars one day.
A. are going to live
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Vocabulary and Grammar › View
. Which of the following is an example of something that might appear in a reflective essay?
A. Some studies suggest exercise may be beneficial.
B. Many people think exercise is good for health.
C. When I first began training to run my marathon, it was hard.
D. It is often said that exercise can help.
