[ 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:
Present, Past and Future Tense › ViewShe … work in the Bank, but she works in that factory.
A. doesn’t
B. didn’t
C. isn’t
D. wasn’t
Demonstrative Pronouns and Verb Tenses › View
The children ____ in the park.
A. are play
B. are playing
C. play
D. is playing
Grammar › ViewJan 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
