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By ________ time we had just left the office, ________ alarm went off.
A. Ø / the
B. a / an
C. a / the
D. the / an

Random Topics:
Present or Past TensesQuantifierQuantifiers: too many, too much & enoughShould, Should not haveTenses and VoiceModals of Necessity and SuggestionRegular and Irregular VerbsPresent Tenses and ConnectorsPresent Perfect Simple & Present Perfect ContinuousSimple Compound and Complex SentencesOther quiz:
Grammar › ViewThey walked __________ their house ___________ the bus stop.
A. from, at
B. from, to
C. at, in
D. on, to
Grammar › View
A: ________ Mike Kevin and Sam’s classmate ten years ago?
B: No, he wasn’t.
A. is
B. was
C. are
D. were
Grammar › View. He______ finished cooking when we arrived
A. have
B. had
C. has
Present Continous Tense › View
… is going to the post office
A. Tiara
B. They
C. We
