It was really very dangerous. One more step, ______ the baby would have fallen into the well.
| A．or | B．so | C．and | D．but |
Up to now，the program________thousands of children who would otherwise have died.
| A．would save | B．saves |
| C．had saved | D．has saved |
—Who do you think ________the book here?
—It may be John.He was sitting here all the morning.
| A．was leaving | B．leaves |
| C．had left | D．has left |
Mum，you really need to have a rest！You ________in the kitchen ever since you came back home three hours ago.
| A．had worked | B．were working |
| C．have been working | D．worked |
I have called the station and they told me the next train for Dalian ________at 3∶10.
| A．will leave | B．left |
| C．has left | D．leaves |
Who do you think ________ for the accident?
| A．to blame | B．to be blamed |
| C．is to be blamed | D．is to blame |