[ Tenses ]
Complete the sentence to correctly describe an interrupted action in the past: I _____ my homework when the power suddenly went out.
A. did
B. was doing
C. have done
D. had done

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For & Since › ViewJoe and Josephine have been going out together _______ Valentine’s Day.
A. since
B. for
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The CEO is committed to __________ a more sustainable business model.
A. developing
B. to develop
C. develops
D. develop
Grammar › ViewIt’s _______ cold to go outside without a jacket
A. too
B. enough
C. very
D. so
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The building was damaged recently ……………… heavy storms.
A. because
B. although
C. by
D. so
