5 a: The snow falls. It covers the ground with a protective layer. (when)
When the snow falls, it covers the ground with a protective layer.
5 b: Her cubs are born. The lioness licks them all over. (as soon as)
As soon as her cubs are born, the lioness licks them all over.
5 c: The paper is collected. It is sent for recycling. (once)
Once the paper is collected, it is sent for recycling.
5 d: Volcanoes erupt. They send huge amounts of smoke into the air. (before)
Before volcanoes erupt, they send huge amounts of smoke into the air.
5 e: The plants perspire. The air becomes humid. (when)
When the plants perspire, the air becomes humid.
5 f: The trees are cut down. The forest is gradually destroyed. (and)
The trees are cut down and the forest is gradually destroyed.
6 a - The food is processed. It is packaged. It is distributed.
for example: As soon as the food is processed, it is packaged and then it is distributed
6 b. The cycle is completed. It repeats itself all over again.
for example: When the cycle is completed, it repeats itself all over again.
6 c. The rubbish is collected. It is sent to a centre for sorting. It is recycled.
for example: c After the rubbish is collected, it is sent to a centre for sorting and then it is recycled.
6 d. A new model of the bicycle is developed. The bicycle is tested.
example: Once a new model of the bicycle is developed, it is tested.
6 e. The TV is assembled. It is sent to the shops.
example: When the TV is assembled, it is sent to the shops.
6 e. The water is purified. It is bottled.
example: As soon as the water is purified, it is bottled.
6 h The prototype is tested. It is modified.
example: Once the prototype has been tested, it is modified.
