[ Grammar ]
During the pandemic, to …………………… everyone’s safety the airlines insisted on all passengers having either a negative PCR test or to be vaccinated.
A. import
B. ensure
C. remove
D. produce
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SynonymsNouns - Word Form-IONCoordinating and Subordinating ConjunctionsGrammar Past and Future TenseGrammar MistakesPhrasal Verb and ModalPresent, Past, and Future TimeTOEFLModal "Have to"Sentence Structure and Grammar RulesOther quiz:
Gerund and Infinitive › View……………………. tea may prevent you from diabetes
A. to drink
B. drink
C. drinking
Future Simple Tenses › View
. Will you—————– me with my project?
A. helps
B. help
C. helping
D. to help
Grammar › ViewWe clean our class by ________.
A. our selves
B. my self
C. her self
D. him self
Grammar › View
Would you like _____ juice?
A. a
B. an
C. some