He’ll be late for the train if he ____________(not start) at once.
A. don’t start
B. doesn’t start
C. did not start
D. will not start

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Grammar for TOEFLApostrophe GrammarSimple Present and Present ContinuosSentence and FragmentCompound and Complex, ConditionalsReported speech (statements)Verb & GrammarModals and InversionActive & Passive VoiceVerbsOther quiz:
Modals for Advice, Obligation/Prohibition, Necessity and Lack of Necessity › ViewWhich answer is incorrect? ‘Should Alan go on Big Brother?’ ‘_______’
A. Yes, he should.
B. Yes, he ought to do it.
C. No, I don’t think he should.
D. No, I think he oughtn’t.
Adjective › View
Since we went to Italy this summer we had to try the Italian pizza.
A. Italy
B. Summer
C. Italian
D. None
Was his tone harsh ____ teasing?
A. nor
B. or
Adverbs and Time Expressions › View
Differentiate between ‘for’ and ‘since’ in terms of time expressions.
A. ‘For’ is used for specific dates; ‘since’ is used for general time periods.
B. ‘For’ and ‘since’ can be used interchangeably in all contexts.
C. ‘For’ indicates duration; ‘since’ indicates a starting point.
D. ‘For’ indicates a starting point; ‘since’ indicates duration.
