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

Random Topics:
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:
Preposition of Time › ViewNext year, we plan to travel to Taiwan _____ September
A. in
B. on
C. at
Modals › View
Jessica _____________ enter the club. She is not 21.
A. can not
B. should not
C. would not
D. might not
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
