[ Grammar ]
I am tired because I ………..
A. worked all day
B. have been working all day
C. have worked all day
D. had been working all day

Random Topics:
Phrasal VerbPast Tense vs Future TenseFuture Perfect TenseFuture Tense (will/be going to/p.continuous)To Infinitive/Bare Infinitive/GerundsNouns & PronounsPast Simple and Past ProgressivePassive Voice - Past SimplePersonal PronounModal Auxiliary VerbsOther quiz:
Grammar › ViewYou won’t pass the test _________ you study hard.
A. as
B. as soon as
C. unless
D. if
Adjectives & Adverbs › View
Which of the following words is an adjective in the sentence: “The quick brown fox jumps over the lazy dog.”?
A. quick
B. jumps
C. over
D. dog
Grammar › ViewWe are very surprised to ________ Peter at the party.
A. seeing
B. see
C. saw
D. sees
Grammar › View
She is
A. ugly
B. small
C. thin