[ Tenses ]
These women ______ songs since morning without getting tired.
A. has been singing
B. has been sung
C. have sung
D. have been singing

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Past Perfect Simple & Past Perfect ContinuousAdverb Clause ConnectorPresent Perfect or Past Simple TenseTenses and VoicePreposition of TimeModals for DeductionPrepositions of Time and PlaceCountable & Uncountable NounsTOEFLModals of Obligation and PermissionOther quiz:
Question Tag › ViewThis is my book, __________?
A. isn’t it ?
B. aren’t it ?
C. won’t it ?
D. shan’t it ?
Homonyms › View
An oboe is a double ___ instrument.
a. read
b. reed