[ Past Continuous Tense ]
Why ________ he ___________ that software the other day?
A. was, using
B. were, using
C. was, use
D. did, used

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Grammar › ViewShe was so ______ to get this job. It’s really great.
A. determined
B. ashamed
C. astonished
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Grammar › View
________ Sahara is the world’s biggest desert.
A. zero article
B. the
C. an
D. a