[ Present Perfect Tense ]
Lisa and Jill ………………………. at the library ……………. three hours.
A. has been / for
B. were / since
C. have been / for
D. have been / since

Random Topics:
Simple Present and Present ContinuosAdverb or AdjectiveTAG QuestionsConditionals (0 - 1 - 2)Was & Were QuestionsZero & First ConditionalVerbs and TensesSimilesCountable QuantifiersPossesive Pronouns and Modals of AbilityOther quiz:
Adjectives Ed and Ing › ViewLaura has worked all day. She is ____________ now.
A. tired
B. tiring
Present Continuous Tense › View
You . . . . . . . . . . . . . . . . . . . . a lot of noise. Can you be quieter? I . . . . . . . . . . . . . . . to concentrate.
A. is makeing/am trying
B. are makeing/ am trying
C. are making/ am trying
D. is making/ am trying