Meaning: "exactly" means in an exact or correct way here.

Wrong options:

• exaclty: Two letters are in the wrong order. Write "exactly". Only the exact spelling gets the mark.
• actually: This is a different word. The sentence needs the exact small word before how.

Correct answer: essential

Explanation: Here you hear "most used and essential tools". You need a describing word for how important it is, so watch the a and i.

Meaning: "essential" means very important or needed here.

Wrong options:

• essencial: It has "c" where the word has "t". Write "essential". Only the exact spelling gets the mark.

Correct answer: mysterious

Explanation: The speaker says "completely mysterious black box". You need a describing word that shows we do not know how it works, watch the ious ending.

Meaning: "mysterious" means not known or hard to understand here.

Wrong options:

• mysterous: It leaves out the "i". Check the letters: "mysterious". A small spelling mistake loses the mark.
• mystical: This word has a different meaning. The sentence wants 'not understandable'.

Correct answer: batteries

Explanation: You hear "replaced their phone batteries". The sentence needs more than one, so do not forget the s at the end.

Meaning: "batteries" means the power cells that give the phone electricity.

Wrong options:

• battaries: It has "a" where the word has "e". Check the letters: "batteries". A small spelling mistake loses the mark.
• battery: "battery" is a close word, but it ends in "y". The speaker says "batteries", which ends in "ies".

Correct answer: possible

Explanation: Listen for "this was possible". The sentence needs a simple word that shows it can be done, watch the le in the middle.

Meaning: "possible" means able to be done or able to happen here.

Wrong options:

• posible: It leaves out the "s". Write "possible". Only the exact spelling gets the mark.
• probable: This word means likely, not the same as 'able to be done'.