[ FOR & SINCE ]
Sue has only been waiting _______ 20 minutes.
A. since
B. for

Random Topics:
ConjunctionsThere is or There areVerbal CommunicationParallelism and Subject Verb AgreementPresent PerfectPronouns and AntecedentsPast Perfect & Past SimplePresent Perfect and Present Perfect Progressive TensesAdjectives & PrepositionPresent simple & ContinuousOther quiz:
Articles and Pronouns › Viewwhich one is correct?
A. a uniform
B. an uniform
Grammar › View
Right now, I ________ to my parents in Jubail.
A. am talk
B. is talk
C. talked
D. am talking
Jan had green eyes, but you never saw them.
A. simple
B. compound
Grammar - TOEIC › View
She is not storng enough __ to work yet.
A. to go
B. go
C. going