[ Articles ]
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:
First Conditional › ViewWe will plant letuce if the rain …
A. stop
B. stops
C. stopped
D. stopping
Modals › View
You __________ at him. He’ll never forgive you.
A. may not have shouted
B. mustn’t have shouted
C. can’t have shouted
D. shouldn’t have shouted
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