[ Modal Verbs ]
It’s a good idea to say “thank you” when someone helps you. → You __________ say “thank you” when someone helps you.
A. mustn’t
B. had to
C. should
D. have to

Random Topics:
Adjectives and ArticlesPunctuationsModal Verbs of PermissionPassive with ModalsModals and PhrasesMaritime Vocabulary and GrammarIrregular AdjectivesGrammar of Future PlansConjunction: Because and SoPresent Perfect Negative and InterrogativeOther quiz:
Tenses › ViewThey will be making photocopies while he ……………….. the report.
A. finishes
B. will finish
C. is finishing
D. will be finishing
Grammar › View
Isaac likes … small animals.
A. the
B. — (= nothing)
C. every
D. all
