[ Modal Verb ]
People who use public parks __________ clean up after themselves.
A. must
B. may
C. ought
D. might

Random Topics:
Nouns and QuantifiersSubject/Verb Agreement with Collective NounsConditionals (0 - 1 - 2)Sentence and FragmentPresent Simple and Present ContinuousFuture Tense (will/be going to/p.continuous)Quantifies and Modals of DeductionPast Tense vs Future TenseQuantifiers: too many, too much & enoughComparative and Superlative AdverbsOther quiz:
Idioms › ViewTo “egg on” means ___.
a. to eat enough
b. to encourage
c. to annoy
Present Tense (Negatives and Questions) › View
Lily ______ (not have) any books.
A. not has
B. not have
C. does not have
D. do not have
Perfect Modals › ViewWhich perfect modal is used to express that something was possible but did not happen?
A. May have
B. Should have
C. Could have
D. Must have
Vocabulary › View
the act or process of moving upward; rise; climb
A. ascent
B. assent
