[ Tenses ]
While mother______ dinner the phone rang.
A. cooked
B. had cooked
C. has cooked
D. was cooking

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Zero Conditional Sentence1st and 2nd ConditionalsTenses - Irregular VerbsComparatives and SuperlativesPresent Simple ProgressiveCompound Words and SentencesQuantifies and Modals of DeductionVerb + Infinitive or GerundV-ing/to-VShould, Should not haveOther quiz:
Grammar › ViewHe (not live) ________ in HoChiMinh city.
A. aren’t lives
B. doesn’t live
C. don’t live
D. isn’t lives
Modal Verbs › View
My grandfather ______ read without glasses when he was 50.
A. mustn’t
B. can
C. could