______elephant is a useful animal to human beings.
A: A
B: This
C: That
D: An
A: A
B: This
C: That
D: An
举一反三
- ________ elephant is ________ useful animal . A: An; an B: The; an C: An; a D: /; a
- What is the theme of the story? ( ). A: Human beings are vulnerable in the nature. B: Human beings are superior to animals . C: Wolves are evil creatures that are dangerous to human beings. D: Human beings should treat animals like brothers with mutual respect.
- The three gods in the play are not superior, but similar to human beings, and are sometimes teased by human beings.
- Vaccines are a useful invention to ______ human beings against many ailments.
- Questions 19 to 21 are based on passage 3-2._____ A: Plants cannot see. B: Plants are invisible. C: Human beings cannot recognize certain species of plants. D: Plants are damaged rather than protected by human beings.