[ 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:
Tenses › ViewHe ______ every morning to stay healthy.
A. jog
B. jogs
C. jogging
D. jogged
Vocabulary › View
Surprisingly, the gang member showed _______________ when questioned about the murder.
A. sepulcher
B. propensity
C. compunction
-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
