[ 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.

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Second ConditionalGrammar ClausesTOEFL GrammarSo / Neither / Either / TooInversions and SubjunctiveAlong & AgainstGrammar - Capitalization and Possessive NounsPast Continues TenseGerund or InfinitiveTransportation VocabularyOther quiz:
Past Modals › ViewThe missing millions
“I don’t understand how all the money went missing,” said the bank
manager as he took Inspector Hall down the dark stairs and into the
underground room where the safe was kept.
“1___ the thieves have got in through this door?” the inspector
asked as the manager unlocked the door.
A. Could
B. Must
Grammar › View
There were ______ buses on the road yesterday.
A many
B much
C little
D every
Grammar and Vocabulary › ViewThe Rong house of the Xo Dang is …………….. big stilt house with a high roof.
A. a
B. an
C. the
Grammar › View
Don’t use this bicycle, because it ___ broken
A. is
B. are
C. do
D. does
