Câu số 31:  

     Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

There is estimated that the Orion nebula contains enough matter to form 10,000 stars.

Câu số 32:  

     Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Great apes are in crisis of becoming extinct.

Câu số 33:  

When did Sylvia Earle discover her love of the sea?

Câu số 34:  

It can be inferred from the passage that Sylvia Earle       .

Câu số 35:  

The author’s opinion of Sylvia Earle is        .

Câu số 36:  

What will the paragraph following this passage probably be about?

Câu số 37:  

The main purpose of this passage is           .

Câu số 38:  

Which of the following is not true about the Jim dive?

Câu số 39:  

What does the passage mainly discuss?

Câu số 40:  

Why does the author mention a bell and rattle in paragraph 1?