Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42.
A. Water
B. Sand
C. Grass
D. Wood
* Đáp án
A
* Hướng dẫn giải
Đáp án A
(1) The protozoans, minute, aquatic creatures each of which consists