Jamaican Usain Bolt was reported ______the world record of 100m in 9.69 seconds, thus winning his first gold medal.
He gets up early and reads English aloud, ___ he has greatly improved his English
The sun shines brightly in the sky______ us light and heat.
This is the ______ bag ______ lost yesterday, but it’s not mine.
----- Do you have clothes ______? I’ll wash them for you. ------No, thank you. I will wash them myself.
______ a good insulator(绝缘体) , rubber is often used in cables.