27. It was with great joy___________he found his lost daughter. A. because B. that C. which D since
----- 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.
I felt ______ tired, but he didn’t stop ______.
All of us need ______.
____ knocked down and hurt worried her friends.