Topics: Tenses
Systematic ocean exploration in the United States of America ____ in 1807 when Thomas Jefferson ___ the survey of the coast.
A. will begin / will authorize
B. began / authorized
C. has begun / has authorized
Select your answer:
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Subject-Verb Agreement › ViewStanding at the end of the train tracks is / are some scary looking outlaws.
A. Is
B. Are
Present Perfect Tense › View
You ___________ (break) the glass again.
A. have break
B. have broke
C. have broken
D. has broken