It's really very dangerous.One more step，________ the baby will fall into the well.
| A．or | B．so | C．but | D．and |
She __________ have left school, for her bike is still here.
| A．can’t | B．wouldn’t | C．shouldn’t | D．needn’t |
__________ many times, he finally understood it.
| A．Being told | B．Telling | C．Having been told | D．Having told |
Every evening after dinner, if not ___________ from work, I will spend some time walking my dog.
| A．being tired | B．tiring | C．to be tired | D．tired |
---- My leg hurts a lot
----You'd better go to the doctor and have it ____.
| A．examined | B．being examined | C．to be examined | D．examining |
Mary went to the box office at lunch time, but all the tickets __________ out.
| A．would sell | B．had been sold | C．have been sold | D．was selling |