Meaning: "made" means created or produced.

Wrong options:

• maed: Two letters are in the wrong order. Check the letters: "made". A small spelling mistake loses the mark.

Correct answer: absorb

Explanation: On the recording you hear "The material can absorb harmful". After "can" you need a plain action word, so use absorb with no extra ending.

Meaning: "absorb" means take something in, like chemicals into the material.

Wrong options:

• abosrb: Two letters are in the wrong order. Write "absorb". Only the exact spelling gets the mark.

Correct answer: variety

Explanation: Listen again to "a variety of techniques such". The word before "of" needs a word meaning more than one, so write variety.

Meaning: "variety" means a number of different kinds.

Wrong options:

• varity: It leaves out the "e". Check the letters: "variety". A small spelling mistake loses the mark.
• various: Various is a describing word, but the sentence needs a thing word before 'of'.

Correct answer: ozone

Explanation: Here you hear "production of ozone via water". You need the name of a gas, so write ozone, four letters starting with o.

Meaning: "ozone" means a gas used to kill germs and clean water.

Wrong options:

• ozon: It leaves out the "e". The right spelling is "ozone". Every letter must be correct to get the mark.