While I _______ (prepare) for the midterm exam, my friend ________ (play) the guitar.
A. prepared / played
B. was preparing / was playing
C. was preparing / played
D. prepared / was playing

Random Topics:
Tenses and OpinionsGrammar PhrasesAdverbs or AdjectivesCausative VerbPresent ContinousCan/CouldPhrases and ClausesPast PassiveSimple and Past TensesWish SentenceOther quiz:
another/the others/each other/one another › ViewShe has 2 laptops, one is grey and ……….. is black.
A. the other
B. the others
C. another
Adverbial Clauses › View
______ the work, he called me out for coffee.
A. When he has finished
B. While he is finishing
C. After he had finished
D. Before he will finish
Modal Verbs › ViewChoose the correct modal verb to express a polite request: “___ you please pass the salt?”
A. Must
B. Should
C. Could
D. Will
Simple Past Tense › View
Affirmative: I got up early last weekend.
Choose the negative:
A. I get up not early last weekend.
B. I did not get up early last weekend.
C. I not got up early last weekend.
D. I did not got up early last weekend.
E. I did not got up early on weekend.