[ Present Perfect Tense ]
Why . . . are the police here? What . . .?
A. happened
B. did happen
C. has happened
D. will happen

Random Topics:
Modals VerbsParticipal PhrasesGrammar: Defining Relative ClausesPast Simple - Present PerfectThe -ing Form of VerbsMust or Mus notAdverb of MannerComplex PrepositionsInterrogative Pronouns & AdverbsNounsOther quiz:
Modal Verbs › ViewThomas spends so much time in front of TV.
A. You shouldn’t take a rest.
B. You shouldn’t write in the notebook.
C. You should drink a lot of water.
D. You shouldn’t watch long time.
Grammar › View
Jamile ___ octopus for the first time last year
A. has eaten
B. eated
C. has ever tried
D. tried
