[ Grammar ]
Something _________ happened or they would be here by now.
A. must
B. must be
C. must have
D. must have been
Select your answer:

Random Topics:
Perfect ModalsPassive and Active SentencesConjunctive AdverbsQuantifiers and ArticlesPast Continuous and Past Simple TenseNoun QuantifiersModals for ObligationUnscramble SentenceVerbs and Possessive AdjectiveOther quiz:
Grammar › ViewAlmost all politicians were involved __________________ the scandal.
A. in
B. at
C. with
D. from
Vocabulary and Grammar › View
I have an ___________ability to read my students’ minds, and i have been like that from childhood.
A. inherent
B. inherit
C. inhibit
D. inhabit