They must have finished the task by the end of last month, ___________?
| A．mustn’t they | B．hadn’t they | C．haven’t they | D．didn’t they |
. In crowded places like airports and railway stations, you __________ take care of your luggage.
| A．can | B．may |
| C．must | D．will |
. The teacher __________ have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose.
| A．should | B．can |
| C．would | D．must |
Every evening after dinner, if not ________ from work, I will spend some time walking my dog.
| A．being tired | B．tiring |
| C．tired | D．to be tired |
________ by the advances in technology, many farmers have set up wind farms on their land.
| A．Being encouraged | B．Encouraging |
| C．Encouraged | D．Having encouraged |
________ the right kind of training, these teenage soccer players may one day grow the international stars.
| A．Giving | B．Having given |
| C．To give | D．Given |