[ Grammar ]
Thanh and Nam________ be in the same class, but I’m not sure.
A. can’t
B. must
C. could
D. might

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Grammar for TOEFLModal and Modal PerfectGrammar PhrasesQuantifiers and ArticlesPresent tense AffirmativeModal SpeculationPresent ProgressiveModals for Advice, Obligation/Prohibition, Necessity and Lack of NecessityPast Tense & Present Perfect TenseGrammar Comma UsageOther quiz:
Grammar › ViewSusan enjoys playing chess, _________ she?
A. don’t
B. didn’t
C. hasn’t
D. doesn’t
Tenses › View
Today, the students … going for a trip.
A. are
B. is
C. was
D. were