[ Grammar ]
The principal opened the office door_____but the student was too nervous to enter.
A. comma ,
B. period .
C. no punctuation
D. semicolon ;

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Types of Simple SentencesModals, Infinitives and GerundsSentence LabelingVerb TenseCompound SentencesModal Verbs & Perfect InfinitiveSimple Present TenseModals of ProbabilityPrepositional PhrasesBare Infinitive and To InfinitiveOther quiz:
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A. were you doing
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She _____ her dog everyday
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My aunt ___ in an international bank for fifteen years.
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