[ Should, Should not have ]
I ___________ _____________ . (wait)
A. waited
B. was waiting
C. shouldn’t have
D. should have waited

Random Topics:
Modal Verbs for SpeculationConjunction: Because and SoCountable & Uncountable NounsNoun Clauses with THATGerund & ParticipleArgumentative VocabularyUsed to & would & Past SimpleApostrophes and Quotation MarksIndirect SpeechCorrelative Conjunction & Complex SentencesOther quiz:
Superlative Adjectives › ViewWhat’s …………….. animal in the world?
A. the dangerousest
B. more dangerous
c. the most dangerous
Grammar › View
A(n) ____ pronoun shows ownership and belonging.
A. reflexive
B. possessive
C. subject
D. object