[ Modals ]
You ___ be more polite to your classmates.
A. should
B. can
C. may
D. must

Random Topics:
Correlative ConjunctionObject PronounGrammar Comma UsageSuffixes and TensesModals and Present TensesPast Tense and Past ContinuousDirect-Indirect SpeechFrequencyComparison of Adjectives and AdverbsGrammar and Passive VoiceOther quiz:
Modal Verbs › ViewI’m certain that she …. what she said. She adores you, she would never want to hurt your feelings.
A. must have meant
B. can’t have meant
C. can’t mean
Relative Clauses › View
The really happy people are those …… enjoy their daily work.
A. what
B. who
C. which
D. where