Câu số 41:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning in the sentence given in each of the following questions.
It is not until a Vietnamese girl getting 18 years old that she is allowed to get married legally.
Câu số 42:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning in the sentence given in each of the following questions.
It is over twenty years since I last got in touch with them.
Câu số 43:
What does the passage mainly explain?
Câu số 44:
According to the passage, helium is
Câu số 45:
The word "constituents" is closest in meaning to
Câu số 46:
Why does the author mention "cosmic rays"?
Câu số 47:
The word "they" refers to
Câu số 48:
The word "vary" is closest in meaning to
Câu số 49:
The creation of helium within stars
Câu số 50:
Most of the helium in the universe was formed