[ 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
Random Topics:
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:
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