—The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
— Oh, dear! She _________ a lot of difficulties!
| A．may go through | B．might go through |
| C．ought to have gone through | D．must have gone through |
He kept a little notebook, in which ______ the names and addresses of his friends.
| A．wrote | B．was writing | C．was written | D．were written |
You _______ pay too much attention to your reading skill, as it is so important.
| A．cannot | B．shouldn’t | C．mustn’t | D．needn’t |
．—I called you yesterday. A woman answered, but I didn’t recognize her voice.
—Oh, it _____ my aunt Jean.
| A．must be | B．must have been | C．might be | D．can have been |
．Would you care to wait here, sir, _____ the manager can see you?
| A．when | B．since | C．until | D．While |
Interest in the Special Olympics______ across the world and now cities______for the honor to host the event.
| A．has spread; are competing | B．spread; compete |
| C．is spread; are competing | D．has been spread; are competing |