[ Grammar ]
He ______ email before, so I ______ him how to use it.
A. did not use / had shown
B. had not used/ showed
C. has not used/ showed
D. was not using / will show

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Sentences Function and Structure › ViewComplete the sentence with the coordinating conjunction that make sense.
Mom wanted a scrapbook of our trip, _____ she took many pictures.
A. or
B. so
C. but
D. yet
Present Tenses › View
How long ________ she _____________ the piano?
A. has / been playing
B. has played