The Mekong River Commission has found no evidence ______ the dams on the upper reaches have an influence on the water flow downstream．
| A．which | B．that | C．where | D．what |
When I arrived，Bryan took me to see the house ________ I would be staying.
(2013·大纲全国，24)
| A．what | B．when |
| C．where | D．which |
The president of the World Bank says he has a passion for China，________he remembers starting as early as his childhood. (2013·江苏，32)
| A．where | B．which |
| C．what | D．when |
He found it increasingly difficult to read，________ his eyesight was beginning to fail.
| A．though | B．for | C．but | D．so |
Goals have to be realistic ________ students can reach them and feel a sense of achievement.
| A．so long as | B．so that |
| C．now that | D．even though |
The agent was about to sign his name to the document ________，to our surprise，a stranger broke in to prevent him.
| A．while | B．when |
| C．as | D．until |