[ 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

Random Topics:
Phrasal Verbs with up and downPre-intermediateModal Verbs and ConjuctionsPresent and Past TensesPassive Voice & TensesWho am I?Infinitives and ING FormsAdverb of MannersPresent Tenses: Simple vs ContinuousPresent ContinousOther quiz:
Grammar › ViewCommon people only care about their own futures. However, great people think about ____________.
A. other
B. another
C. other’s
D. others’
Present Tenses › View
It’s an old TV. It ________________.
A. doesn’t work
B. isn’t working
C. hasn’t worked
D. hasn’t been working
Future Tenses › ViewTo make a promise we use…
A. present simple
B. be going to
C. future simple
D. future continuous
Relative Clauses & Real Conditionals › View
Choose the appropriate first conditional sentence: If I see him tomorrow, I ______ him about the meeting.
A. told
B. will tell
C. would tell
D. tell
