MILLIONS OF TONS OF GARBAGE …….….INTO THE OCEANS SINCE THE 20TH CE...
39. Millions of tons of garbage …….….into the oceans since the 20
th
century.
A. are thrown B. were thrown C. have thrown D. have been thrown
39. Millions of tons of garbage …….….into the oceans since the 20
th
century.
A. are thrown B. were thrown C. have thrown D. have been thrown