In the global economy，a new drug for cancer，________it is discovered，will create many economic possibilities around the world.
| A．whatever | B．whoever | C．wherever | D．whichever |
___ an answer, I wrote to him again.
| A．Having not received | B．Not having received | C．Not receiving | D．Did not receive |
When we got into trouble, __ people came to help us.
| A．a number | B．a number of | C．the number of | D．the numbers of |
She could do nothing but __.
| A．cry | B．to cry | C．crying | D．cried |
I’ve never seen ___ you.
| A．a such man like | B．a such man as | C．such a man as | D．such a man like |
The light is still on. He --- out.
| A．can’t have gone | B．mustn’t have gone | C．have to | D．ought have gone |