Mark the letter A, B, C, or D to indicate the correct answer to each of the following sentences.

Câu hỏi

At least 26 species of cetaceans (whales, dolphins and porpoises) _____ as ingesting plastic debris.

A. have documented

B. had documented

C. have been documented

D. had been documented

Đáp án
C. have been documented

Câu hỏi thuộc Bài tập:

Unit 6. ENDANGERED SPECIES (Bài tập 2) - Tiếng Anh lớp 12