[ Grammar ]
Our company opened ______ office in Singapore last week, and we didn’t know they were planning to open one.
A. an
B. a
C. the

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Quantifiers and ArticlesPhrasal Verb Put & GoGrammar: Reported QuestionsModals of Speculation and DeductionGrammar for TOEFLPreposition and ConjunctionPast Continuous Tense & Past ModalsIN, ON & ATGrammar on ConditionalsPresent and Past Simple PassiveOther quiz:
Modal Verb › ViewIt’s possible that it rained heavily last night.
A. It must have rained heavily last night.
B. It should have rained heavily last night.
C. It might have rained heavily last night.
D. It need have rained heavily last night.
Articles › View
My son is at ___ airport now
A. a
B. an
C. the
D. no article
Grammar › ViewLast year I didn’t work hard, but this year I……..
A. worked hard
B. didn’ work hard
C. have worked hard
D. had worked hard
Tenses › View
Choose the correct form: I (not finish) my project yet.
A. did not finish
B. have not finished
C. have not finish
D. not finished have
