All possible means ________been taken to prevent the river________．
| A．have;polluting |
| B．has; polluted |
| C．has; from polluted |
| D．have;being polluted |
“I ___in the room, watching TV.” I told the policeman who had driven here to question me.
| A．stayed | B．stay | C．was staying | D．am staying |
____, I could not memorize the text.
| A．However hard did I try | B．However hard I tried |
| C．However I tried hard | D．However I had tried hard |
---Don’t you think 400 thousand yuan is the right ___of the house?
---No. It’s more than I can afford.
| A．money | B．price | C．value | D．cost |
He asked , “ Are you a Party member or a League member?”
→He asked me _________.
| A．am I a Party member or a League member |
| B．was I a Party member or a League member |
| C．if I was a Party member or a League member |
| D．whether was I a Party member or a League member. |
--Have you ever heard of an American president called Chester A.Arthur?
--No, and he is not mentioned in my history book at all. He seems ______________.
A. to have been completely forgotten B. having completely forgotten
C. to have completely forgotten D. completely forgetting