[ Perfect Tenses ]
My back hurts because I … here for three hours.
A. was standing
B. have stood
C. have been standing
D. had been standing

Random Topics:
Relative Clauses and etcPersonal PronounQuantifies and Modals of DeductionSimple PastVerb, Object, PrepositionSports VocabularyModal Verbs and Gender NounsGrammar Past and Future TenseGerundSuperlative AdjectivesOther quiz:
Direct and Indirect Speech › ViewI said to him, ‘Why don’t you work hard?’
A. I asked him why didn’t you work hard.
B. I asked him why he didn’t work hard.
Modals › View
Choose the correct sentence!
A. Can you swim?
B. You can swim?
C. Can you to swim?
D. You can to swim?
Grammar › ViewIdentify the adjective in the sentence:
The ball is so big.
A. ball
B. is
C. big
Plural › View
What’s the plural of wolf?
A. Wolfs
B. Wolfes
C. Wolves