. _______of the household rubbish _______recycled or reused since the new technology was applied.
The fireman succeeded in saving all the people in the house on fire, _______they knew they were in great danger themselves.
My brother ______French while he was working in Paris, and he could speak it very well.
It is normal for students to feel_______ before the examination even though they have prepared well.
The little girl seems to ____a lot since I last saw her.
Most experts agree that washing hands regularly is a ______way to prevent the spread of many diseases.