I tried hard to get some information about the new technology out of his mouth,but he remained __________.
| A．quiet | B．secret | C．silent | D．calm |
----- 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 |
_______ about the universe up till now.
| A．So little had me known | B．Only a little do we know |
| C．Very little have we known | D．Little shall we know |