[ Grammar ]
Which sentence is correct?
A. The manager was tired because he was working all day.
B. The manager was tired because he had been working all day.
C. The manager was tired because he worked all day.

Random Topics:
Adjectives and AdverbsGrammar for IELTSFor vs SincePresent Tenses and ConnectorsAdjective / Noun + to InfinitiveParts of SpeechPrepositionsDemonstrative SpeechVerb 3 formsPrepositions & Modal VerbsOther quiz:
Grammar › ViewWhich of the following is a verb?
A. quick
B. solve
C. excitement
D. mystery
Tenses › View
Louis _____ never ______ to Russia. Can you imagine? ( to go )
A. was ____ going
B. has _____ gone
C. has ______ been
D. does ____ go