The time he has devoted in the past ten years ________the disabled is now considered _______of great value.
Stephen Hawking thinks _______ important to have hope in bad situation.
_______do you sleep every night? —Six to eight hours. [ ]
Excuse me, I want to buy some food. Where can I find a supermarket? —I know _____ not far from here. You can easily find ________.
What class are you in? —I’m in Class Two _____ David and Helen. [ ]