[ Grammar ]
I____ (study) all day. I’m so tired. I haven’t finished yet.
A. have been studying
B. has been studying
C. is studying
D. am studying

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Grammar and Vocabulary › ViewA ______ is a big bird with a sharp beak.
A. butterfly
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C. camel
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On Sunday, I (swim) from six to eleven in the morning
A. adjective
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Sandra ________ to do the dishes for her mother yesterday.
(A)volunteer
(B)volunteered
(C)is volunteering
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