[ 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

Random Topics:
Coordinating Conjunctions and Comparative AdjectivesSimple Present and Present Continuous TenseTOEIC GrammarGrammar and Sentence CorrectionTenses and Verb FormsPast and Past ContinuousVerbs, Tenses, and VocabularyQuestion TagsPast Simple and Past ContinuousCommasOther quiz:
If Clause › ViewIf there had been enough water, the rice fields _____ more productive.
A. would have been
B. will have been
C. will be
D. would be
Present Simple, Present Continuous or Present Perfect › View
She _____ (walk) to school today because it ______ (rain).
A. is walking / is raining
B. hasn’t walk / has rain
C. walks / has rained
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
