[ Grammar ]
Yesterday, Jim was playing the piano __________ his sister was playing the flute.
A. as
B. although
C. while

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Contrast Linking WordsPast Perfect and Past Perfect ContinuousArticles & PrepositionTo Infinitive or GerundQuestion TagAdjectives (-ed / -ing)Present Simple and Present ContinuousPassive SentenceConditional Sentence Type 1Prepositions - ConjunctionsOther quiz:
Prepositions › ViewJames’ wife accused him _____________ cheating.
A. Up
B. To
C. With
D. Of
Grammar › View
I didn’t watch the program because I __________(see) it before.
A. have seen
B. had seen
C. see
D. am seeing
Grammar › ViewWhat is the past tense form of smile?
A. will smile
B. smiled
C. is smiling
Vocabulary › View
In order to learn, all children must …….. school.
A. have
B. graduate
C. abandon
D. attend