[ Present Perfect Tense ]
That scientist _________________ a cure for one type of cancer. His achievement was announced in the NY Times last week.
A. Discovers
B. Is discovered
C. Is discovering
D. Has discovered
Select your answer:
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Prepositions › View_____ the lesson ends, I’ll go home.
A. Before
B. Until
C. If
D. As soon as
Grammar › View
A. Confused
B. lonely
C. proud
D. relaxed