[ 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:
Modal Verbs › ViewToday we ________ make friends on the Internet.
A. have to
B. must
C. can
D. mustn’t
Adjective › View
Danielle has ___ sister, not two.
a.a
b. one
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
