[ Have to ]
Mary…………to tidy up.
A. does
B. to
C. has
D. have

Random Topics:
Perfect Progressive TensesBecause / soGrammar - too & enoughThe -ing Form of VerbsGerund and InfinitivesIf ClausesPerfect and Past TensesSentence StructureSo or SuchNarrative TensesOther quiz:
Grammar › ViewJulia left the restaurant after she __________eating.
A. had have finished
B. had finished
C. have finish
D. has finished
Preposition Form › View
Choose the correct option to fill in the blanks with suitable prepositions.
Africa, the origin of life, abounds _______ endless red deserts and intolerably hot storms.
A. by
B. upon
C. with
D. through
Word Form & Verb Tense › ViewIn 21st century, scientists continue to look for new ways _____ serious disease and slow down the ageing process
A. to treat
B. treat
C. treatment
D. treated
Vocabulary › View
a system of ideas to explain something
A. servant
B. evaluate
C. theory
D. preserve