[ Grammar ]
They still not ___ the office
A. Leave
B. Have Left
C. Has Left
D. Is Left

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So or SuchThe -ing Form of VerbsPassive and Active VoiceAsking for and Giving OpinionSentence and FragmentAdjective vs AdverbApologizingOffer and SuggestionMust Vs Have toSimple, Compound, Complex SentencesOther quiz:
Grammar › View“How long has it been since you last traveled by plane?”
“The last time I flew was _______.”
A. before five years
B. five years ago
C. for five years
D. during the five years
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Breathing is a mechanical process ____ fills the lungs with air.
A. when
B. where
C. which
D. whose