[ Present Simple and Modal Verbs ]
. You ___ chew gum in class.
A. mustn’t
B. can
C. may
D. must

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Countable & Uncountable NounsPrefixes SuffixesToeic VerbSentence LabelingGrammar and EssayPast Perfect and Past Perfect ContinuousGrammar ( going to)Grammar for TOEFLCommunicative GrammarPresent Perfect Simple vs ContinuousOther quiz:
Idioms › ViewSometimes in a bad situation, there may still be some good things. Try not to “throw out the ………. with the bathwater”.
A. fish
B. duck
C. baby
D. child
Present Perfect vs Past Simple › View
I _____ this film already, so I’m not going to the cinema with you.
A. saw
B. have seen
C. haven’t seen
D. seed