[ Present Perfect Tense ]
He started to work in the office at 8 o’clock. It’s now 12 o’clock and he just stopped it. It means that he …. for four hours.
A. has worked
B. worked
C. has been working
D. is working

Random Topics:
Present and Past TensesModals, Infinitives and GerundsAdverb PhrasesConditional Sentence Type 3Countable & Noncountable NounsFuture TenseGerunds and InfinitivesSo / Neither / Either / TooContractions and ConjunctionsWish SentencesOther quiz:
Adverbs, Prefixes, and Suffixes › ViewCHOOSE THE APPROPRIATE FORM OF THE ADVERB
Bruno Mars sang …… at the concert. (magic)
A. magically
B. magicly
Grammar › View
You had better__________with a really good travel agent
A. booking
B. to book
C. with booking
D. book
Vocabulary › ViewWhen studying for the vocab midterm, you’ll need to ___ all the words into one list.
A. Aggregate
B. Affable
C. Articulate
D. Bizarre
Grammar › View
Some models hardly go out and they avoid _________ to clubs and restaurants. (go)
A. go
B. going
C. to go
D. to going
