[ Grammar ]
Many new ways of saving energy………by scientists at the moment
A. Are being developed
B. Will be developed
C. Have developed
D. Had been developed

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Grammar › View______ best friend is hilarious!
A. They’re
B. There
C. Their
Simple Past Tense › View
Julio … an active student last year. He dropped out because he never registered his name again.
A. is
B. didn’t
C. was
D. wasn’t