[ Modal Verbs of Deduction and Speculation ]
There’s someone studying at the library.
A. It can be David. I think he’s at home.
B. It can’t be David. I think he’s at home.

Random Topics:
Second ConditionalGrammar ClausesTOEFL GrammarSo / Neither / Either / TooInversions and SubjunctiveAlong & AgainstGrammar - Capitalization and Possessive NounsPast Continues TenseGerund or InfinitiveTransportation VocabularyOther quiz:
Grammar › ViewMary watched her mom ______into the kitchen five minutes ago.
A. went
B. to go
C. going
D. goes
Grammar › View
Kyla ____her sweater on the sofa.
A. lays
B. lies
Grammar and Vocabulary › ViewThe Rong house of the Xo Dang is …………….. big stilt house with a high roof.
A. a
B. an
C. the
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Don’t use this bicycle, because it ___ broken
A. is
B. are
C. do
D. does
