[ Modals with Perfect Infinitive ]
A: I phoned you at nine this morning but got no answer. B: I’m sorry. I ___ been in the garden.
A. should have
B. must have
C. can have
D. could

Random Topics:
Nouns, Articles, DeterminersRelative Pronouns and AdverbsGender and GrammarNoun PhraseSuperlativesModals: Possibility, Necessity, ExpectationCommunicative GrammarArticles and QuantifiersModals and Semi-ModalsToeic VerbOther quiz:
Grammar › ViewChoose the best word to complete the sentence.
Extreme sports are relatively __________ as long the participants are well-trained.
_____
A. insignificant
B. uninspiring
C. harmless
D. unimportant
Present Simple Passive › View
The policeman catches the crook.
A. The crook is caught by the policeman.
B. The policeman is caught by the crook.
C. The crook is catched by the policeman.
D. The crook are caughted by the policeman.