Listen and underline the parts where assimilation occurs. Then practise reading the sentences in pairs.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. Apes are larger than monkeys.

2. If fed properly, the bear will recover soon.

3. Both species benefit from living together.

4. Ten per cent of the world's population was infected by the virus.