Meaning: "characteristics" means the features or qualities of something.

Wrong options:

• charcteristics: It leaves out the "a". Check the letters: "characteristics". A small spelling mistake loses the mark.
• characteristic: "characteristic" has no "s" at the end. The speaker says "characteristics", so write the "s".

Correct answer: planet

Explanation: On the recording you hear "solar system's biggest planet and". It comes after "biggest", so you need a word for a thing.

Meaning: "planet" means a large body that moves around a star.

Wrong options:

• planent: It adds an extra "n". The right spelling is "planet". Every letter must be correct to get the mark.
• planets: "planets" has an extra "s" at the end. The speaker says "planet", with no "s".

Correct answer: astronomers

Explanation: Listen again to "targets for astronomers in". It follows "for", so you need a word for people and it ends in s.

Meaning: "astronomers" means people who study stars and planets.

Wrong options:

• astronmers: It leaves out the "o". The right spelling is "astronomers". Every letter must be correct to get the mark.
• astronomer: "astronomer" has no "s" at the end. The speaker says "astronomers", so write the "s".

Correct answer: detect

Explanation: Here you hear "easy to detect as they". It comes after "easy to", so you need an action word.

Meaning: "detect" means to find or notice something.

Wrong options:

• detects: "detects" has an extra "s" at the end. The speaker says "detect", with no "s".