Câu hỏi:

Choose the letter A, B, C or D to answer these following questions

A new study published in the journal Science shows definitive evidence of organic matter on the surface of Mars. The data was collected by NASA's nuclear-powered rover Curiosity. It confirms earlier findings that Mars, the Red Planet once contained carbon-based compounds. These compounds – also called organic molecules – are essential ingredients for life as scientists understand it.

The organic molecules were found in Mars's Gale Crater, a large area that may have been a watery lake over three billion years ago. The rover encountered traces of the molecule in rocks extracted from the area. The rocks also contain sulfur, which scientists speculate helped preserve the organics even when the rocks were exposed to the harsh radiation on the surface of the planet.

Scientists are quick to state that the presence of these organic molecules is not sufficient evidence for ancient life on Mars, as the molecules could have been formed by non-living processes. But it's still one of the most astonishing discoveries, which could lead to future revelations. Especially when one considers the other startling find that Curiosity uncovered around five years ago.

Question: Why are the evidences in sufficient to claim life on Mars?

A. The molecules could have been formed by non-living processes.

B. The molecules exist everywhere on the planet.

C. All planets have these molecules.

D. The existence of these molecules is not strong enough.

Câu 1:

Choose the letter A, B, C or D the word that has the underlined part different from others.

A.  surface

B. trace

C. danger

D. space

Câu 2:

Choose the letter A, B, C or D to complete the sentences

Neil Armstrong is considered as the first person __________ on the Moon.

A. step

B.  steps

C. stepping

D.  to step

Câu 3:

Choose the letter A, B, C or D to complete the sentences with given words

The/ biggest problem/ for/ humans/ live/ other planets/ be/ lack/ atmosphere and water.

A.  The biggest problem for humans to live in other planets is lack of atmosphere and water.

B. The biggest problem for humans living on other planets is lack of atmosphere and water.

C. The biggest problem for humans to living in other planets is lack of atmosphere and water.

D. The biggest problem for humans to live on other planets is lack of atmosphere and water.

Câu 4:

Choose the letter A, B, C or D to complete the sentences

Space __________ is the main vehicle for astronauts to travel on the Moon.

A.  buggy

B. system

C. surface

D. planet

Câu 5:

Rearrange the sentences to make meaningful sentences

NASA/ launch/ decided/ Cape Canaveral/ end/ at/ from/ of/ the/ a rocket/ this year.

A.  NASA decided launch to a rocket from Cape Canaveral at the end of this year.

B. NASA decided launch from a rocket to Cape Canaveral at the end of this year.

C. NASA decided to launch a rocket at from Cape Canaveral the end of this year.

D. NASA decided to launch a rocket from Cape Canaveral at the end of this year.

Câu 6:

Choose the letter A, B, C or D to answer these following questions

A new study published in the journal Science shows definitive evidence of organic matter on the surface of Mars. The data was collected by NASA's nuclear-powered rover Curiosity. It confirms earlier findings that Mars, the Red Planet once contained carbon-based compounds. These compounds – also called organic molecules – are essential ingredients for life as scientists understand it.

The organic molecules were found in Mars's Gale Crater, a large area that may have been a watery lake over three billion years ago. The rover encountered traces of the molecule in rocks extracted from the area. The rocks also contain sulfur, which scientists speculate helped preserve the organics even when the rocks were exposed to the harsh radiation on the surface of the planet.

Scientists are quick to state that the presence of these organic molecules is not sufficient evidence for ancient life on Mars, as the molecules could have been formed by non-living processes. But it's still one of the most astonishing discoveries, which could lead to future revelations. Especially when one considers the other startling find that Curiosity uncovered around five years ago.

Question: Have there been enough evidences to confirm the existence of life on Mars?

A.  Yes, there have

B.  No, there haven’t