[ 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:
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