—Have you found out the telephone number I need？
—Yes，but ______，I have sit here for nearly a half hour.
| A．for finding it out | B．to find it out |
| C．for finding out it | D．to find out it |
It is human activities on the earth that are to _______ global warming.
| A．be blamed for | B．to blame for | C．take charge of | D．be responsible with |
I like the house with a beautiful garden in front, but I can’t afford______．
| A．one | B．this | C．it | D．that |
His glasses, _____he was like a blind man, were broken.
| A．with which | B．with it | C．without which | D．without it |
Experiments of this kindin both the U．S．and Europe well before the Second World War．
| A．have conducted | B．have been conducted |
| C．had conducted | D．had been conducted |
So _____ in the darkness that he didn’t dare to move an inch.
| A．he was frightened | B．was he frightened | C．frightened he was | D．frightened was he |