[ Modals ]
Since they aren’t answering the phone, they _____.
A. need have left
B. can’t have left
C. must have left
D. should have left

Random Topics:
Modal VerbsAdverbs and PhrasesPrepositions - ConjunctionsConjunctions in Complex SentencesModals and PrepositionPresent Perfect vs Past Simple TenseTOEFL Adjective and AdverbVerbsPossessive Pronouns and QuantifiersGrammar: Reported QuestionsOther quiz:
Grammar › ViewWho’s that over there? – Oh, it’s our new teacher, ____ just started work today.
A. That
B. Who he
C. Which he
D. Who
Grammar › View
The university is ______ progress in the ongoing development of educational programs, services and facilities.
A. having
B. doing
C. making
D. taking
Tenses › ViewDon’t you want to see this horror movie? It ………….(start).
A. has started
B. is starting
C. will be started
D. starts
Past Progressive Tense › View
I ………………. reading a magazine.
A. were
B. was
