_______he couldn't understand was_________more and more students showed interest in the computer games.
| A．What； because | B．That, what | C．What； why | D．Why； that |
The sun shines brightly in the sky______ us light and heat.
| A．that give | B．having given | C．to give | D．giving |
----- Do you have clothes ______? I’ll wash them for you.
------No, thank you. I will wash them myself.
| A．to be washed | B．to wash | C．washing | D．being washed |
______ a good insulator , rubber is often used in cables.
| A．Having been | B．To be | C．Be | D．Being |
Do you mind ______ alone at home?
| A．Jane leaving | B．Jane having left |
| C．Jane’s being left | D．Jane to be left |
______ unless I call you.
| A．Please come | B．Not come in | C．Don’t come in | D．Come in |