[ Grammar ]
They _____ at this conference for the last two days.
A. have been
B. were
C. are
D. be

Random Topics:
Simple Past Tense and Past Perfect TenseModal VerbSpeculation with Modal VerbsAuxiliary Verbs, if, unless and ModalAdverbial ClauseComparatives - SuperlativesSentence Adverbs & Third ConditionalPresent PerfectFigure of SpeechModals - Reported Speech - ConditionalsOther quiz:
Past Continuous › ViewWhich one is past simple sentences?
A. Emma went to Australia last week.
B. I go to school by bike.
C. She likes butter sandwich.
D. They are riding a bike at the moment.
Grammar › View
This is the place _________ we stayed last time we visited.
A. where
B. when
C. how
Conjunctions › ViewTony is poor _____ honest.
A. Because
B. Unless
C. But
D. Since
Grammar › View
_____ time do you usually get up?
A. What
B. When
C. How
