________ true events, the film follows the life of Ali, a world famous boxer in the US.
| A．Being based on | B．Basing on |
| C．Based on | D．Having based on |
— Did you tell Mother you have passed the exam?
— Oh, I forgot. I _______ her now.
| A．will call | B．will be calling |
| C．am calling | D．am to call |
If he ________ my advice, he wouldn’t have lost his job.
| A．followed | B．had followed |
| C．should follow | D．would follow |
We _________ the difficulty together, but why didn’t you tell me?
| A．should face | B．might face |
| C．could have faced | D．must have faced |
Many people can’t learn any lessons from the mistakes they’ve made ________ they get hurt somehow.
| A．whether | B．as | C．if | D．unless |
—Have you been to the United States?
—Yes, only once. I ________ there only for seven days.
| A．have stayed | B．was staying |
| C．stayed | D．had stayed |