[ Grammar ]
______ United States working on global warming?
A. Is
B. Are

Random Topics:
Verbs + Infinitives / GerundsRelative - ConditionalVerb Tenses and Subject Verb AgreementAdverbs and Adverbial PhrasesAdverbs or AdjectivesThe Future Simple TensePresent Simple x Present ContinuousHabitual and Continuous TensesVerb ConjugationGrammar and StructureOther quiz:
Present Tense › ViewBayu is a guitarist of our school’s band. He ______ guitar really well.
A. play
B. plays
C. played
D. playing
Past Tense vs Present Perfect Tense › View
I ___________ (go) to Olympian City 2 for lunch yesterday.
A. go
B. gone
C. have gone
D. went
Future Tenses › ViewIf you decide to come by this afternoon, don’t knock as I _______ in the back garden so I won’t hear you.
A. will probably be sitting
B. will sit
Tenses › View
John __________ (not like) studying English.
A. doesn’t like
B. didn’t like