[ 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:
Grammar › ViewTia: Who broke the plate? Steve: Not me! _____
A. It won’t take long.
B. It wasn’t my fault.
C. I’m sorry to hear that.
Tenses › View
We _______ dinner when the power went out.
A. had just finished
B. just finished
C. finish
D. finished
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
