A. WAS POLLUTED B. IS POLLUTED C. HAS BEEN POLLUTED D. WAS POLLUTED

Lớp 11 Tiếng Anh ĐỀ KIỂM TRA 45 PHÚT MÔN TIẾNG ANH LỚP 11 LẦN 4 TIẾNG ANH LỚP 11 ÔN LUYỆN

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33.A. was polluted B. is polluted C. has been polluted D. was polluted