Generally speaking, according to the directions,the drug has no side effect.
| A．when taking | B．when taken |
| C．when to take | D．when to be taken |
The UN Climate Change Conference in Copenhagen was held in a tense ______ due to lack of deep understanding.
| A．atmosphere | B．state | C．situation | D．phenomenon |
--- I borrowed 10 dollars from Cathy, but she insisted that I borrowed 15 dollars from her.
--- I ______ you the money. Why didn’t you ask me?
| A．must lend | B．could have lent | C．would lend | D．should have sent |
They want to make ______ clear to the public that they are doing an important and necessary job.
| A．this | B．it | C．what | D．that |
Up till now, more than 120 world-famous enterprises ______ companies in Tianjin Binhai New Area.
| A．have established | B．established | C．will establish | D．have been established |
He came to a point ______ there was no more road to follow, and before him he could see nothing but a thick forest.
| A．that | B．what | C．which | D．where |