Adam’s boss taught him ____ when to be stubborn and when to step back and quietly observe the situation at meetings with partner companies.
A. either
B. not only
C. whether
D. both

Random Topics:
Modal Verbs & Reflexive PronounsWill vs Verb InfinitivesTo Infinitive/Bare Infinitive/GerundsModal RequestsGrammar and StructureDegrees of ComparisonModal, Causative Verb & Elliptical StructureAdverbs or AdjectivesGrammar of Conjunctions and PrepotitionsPresent Forms and Narrative TensesOther quiz:
Vocabulary › ViewExplain the term ‘intangible’.
A. a special advantage
B. an amount beyond the minimum
C. continuing or lasting
D. not having physical value; unable to be touched
Grammar › View
My arms are aching now because _______________ since two o’clock.
A. I’m swimming
B. I swam
C. I swim
D. I’ve been swimming
Present Tenses › ViewMy mom (NOT FINISH) ___________ the book she (START) _______ reading a few days ago.
A. hasn’t finished / starts
B. hasn’t finished / started
C. hasn’t been finishing / starts
D. hasn’t been finishing / started
Grammar › View
Have you finish ____________homework?
A. to do
B. doing
C. do
D. A and B are correct
