[ Grammar ]
Why … you waiting here?
A. are you
B. did you
C. do you
D. was you

Random Topics:
Possessive NounsConjunctions and PrepositionsComparison & Modal Verbs in Passive VoiceConditional Sentences Type 1Subject Verb Agreement and Coordinating ConjunctionsPresent or Past TensesGrammar - to be, possessive, have gotArticles with SubstancesPronouns and AdverbsTransitional WordsOther quiz:
Science › ViewA branch of geology dealing with the classification, nomenclature, correlation, and interpretation of stratified rocks.
A. Statigraphy
B. Meteorology
C. Sedimentology
D. Atmospheric physics
Modals with Perfect Infinitive › View
I saw the light coming out of his living-room window last night. He ___ been reading or watching TV. I’m not sure.
A. must have
B. might have
C. should have
D. can have
Grammar - help/have/let/make › ViewI ______ the mechanic (維修員) fix my car.
A. had
B. make
C. let
Articles › View
Do you often listen to ________ radio?
A. –
B. the
C. a | an
