[ Tenses ]
I’m tired. I _____ the house since 9 this morning.
A. am cleaning
B. was cleaning
C. had been cleaning
D. have been cleaning

Random Topics:
Present/Past/Past ParticplePresent/Future/Past Simple/Present PerfectVerb Tense, Pronouns and AntecedentsArticle & PrepositionComparative AdverbsTo infinitive - GerundVerbs and AdverbsMaritime Vocabulary and GrammarQuantifiers & Modals of ObligationPast Tense and Perfect TenseOther quiz:
Vocabulary and Grammar › ViewWhich of the following is an adverb of certainty?
A. definitely
B. slowly
C. sometimes
D. here
Grammar › View
Choose the grammatically correct sentence.
A. If I am a child, I would play outside.
B. If I were a child, I would play outside.
Grammar › ViewMy brother is clever ……. tall.
A. and
B. or
C. but
Comma › View
Which sentence is written correctly?
A. The busy servers took orders and delivered meals to hungry customers.
B. The busy servers took orders, and delivered meals to hungry customers.
C. The busy servers, took orders and delivered meals to hungry customers.
D. The busy servers, took orders and delivered meals, to hungry customers.
