[ Modals ]
The children didn´t went to the school. they _____ sick
A. must been.
B. could have been.
C. may have been.
D. could have been.

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Mixed General Quiz › ViewIf you want to make a phone call to Salt Lake City, you need to ___ that the area code is (801).
a. remember
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c. remembering
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Articles › View
We use ___ when we talk about uncountable, plural and abstract nouns generally.
e.g. ___ success in life is something that many of us strive for.
A. a
B. an
C. the
D. no article