# 1Multiple ChoiceWhich modal verb is most appropriate to express a strong obligation or a rule that must be followed?MayCouldMustShould
# 2Multiple ChoiceWhen asking for permission in a formal setting, which modal verb is generally preferred?CanMightWillMay
# 3Multiple ChoiceTo express a possibility in the past, which modal verb combination is typically used?Could have + past participleShould have + past participleWould have + past participleMight have + past participle
# 4Multiple ChoiceWhich modal verb is used to give advice or make a recommendation?MustShallShouldOught to