[ 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:
Articles › ViewWhy didn’t you keep it in … secret?
A. the
B. an
C. a
D. –
Grammar › View
In questions, the subject is the person, place, thing, or idea that is being asked about. What is the subject of the question? Who is the president of the United States?
A. The president of the United States
B. Who
C. The United States
D. Is
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
