[ Vocabulary ]
a substance used to keep people from getting a disease
A. protect
B. symptom
C. vaccine
D. virus
Select your answer:
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Tenses Structure › ViewWhich sentence is in the Future Perfect Continuous tense?
A. I will have completed my work by next week.
B. I will have been working here for a year by next month.
C. I am working here for a year.
D. I worked here last year.
Adverbs, Modals, Preposition of time › View
You _____________do your homework.
A. should
B. shouldn’t
C. have to
D. don’t have to