The light will be thrown ______ the cause of cancer by research that is now in progress.
| A．to | B．upon | C．in | D．for |
The young waiter knocked over the red wine by chance, ____ the table cloth.
| A．ruined | B．to ruin | C．having ruined | D．ruining |
So quickly are science and technology advancing ____ is a possibility today may be a reality tomorrow.
| A．what | B．that | C．what that | D．that what |
— I find it astonishing that John ____ be so rude to me.
— Not astonishing at all. He is always rude to others.
| A．should | B．must | C．might | D．ought to |
— Go and see who is making so much noise.
— ____ the children.
| A．There are | B．They are | C．That is | D．It is |
Only through ____talks can we build trust and only through cooperation can create ____ win-win economic situation.
| A．\ ; a | B．the ; the | C．\ ; the | D．the ;a |