[ Present Perfect and Present Perfect Progressive Tenses ]
They ___ (work) on this project for two weeks.
A. are working
B. have been working
C. work
D. have worked

Random Topics:
Will and Going toTenses of Verbs - UsageTenses of VerbsModal Verbs in ConditionalsGerund, Infinitive & ModalsPresent Perfect TenseSuffixes (ing-ed) SentencesIdentify The TensesGrammar - help/have/let/makeModals and Past TensesOther quiz:
Grammar › ViewChoose whether it is a simple, compound, or complex sentence.
Some artists specialize in designing typefaces that are used in books, magazines, and newspapers.
A. simple
B. compound
C. complex
Conjunctions › View
I read news online regularly …. know what’s happening in the world
A. for
B. in order to
C. in order that
-ed or -ing › ViewKevin looked ……. when he heard the news.
A. surprised
B. surprising
Conjunction › View
__________ Craig already had his ticket, he still had to wait in line to see the movie.
A. Although
B. Because
C. Unless
D. Yet
