[ Grammar ]
I _____ the vase while I _____ the bookshelf.
A. broke / was cleaning
B. broke / cleaned
C. was breaking / was cleaning

Random Topics:
Determiners & QuantifiersSimple Past TenseParticipal PhrasesNounRelative & ModalsIndefinite and Reflexive PronounsModal Verbs & Time PrepositionsPresent Continuous for FuturePresent Progressive (Future)English MorphosyntaxOther quiz:
Vocabulary › Viewa gloomy state of mind; sober thoughtfulness
A. rueful
B. brooch
C. melancholy
Past Perfect Simple › View
Charlie failed the English test because
A. he hadn’t studied enough.
B. he had grown a beard.
C. he had broken his glasses.
D. they had just had dinner.
Subjunctive › ViewIt’s high time the children … in bed.
A. were
B. are
C. to be
Vocabulary & Grammar › View
I didn’t ___ to like broccoli when I was younger, but I love it now.
A. used
B. use
C. using
D. to use
E. uses