the sentence , so he asked the teacher to explain it again.
| A．Not having understood | B．As he didn’t understand |
| C．Having not understood | D．He didn’t understand |
---_____ will we have to go?
---Just one mile. Keep walking.
| A．How long | B．How far |
| C．How many longer | D．How much farther |
The injured died on _____ Thursday after _____ accident.
| A．the…the | B．/…an | C．the …an | D．/…the |
The nurse treated the naughty boy very kindly, but her patience _____ at last.
| A．used up | B．gave out |
| C．run out | D．was run out |
You can use a large plastic bottle, _____ cut off, as a pot to grow your plant in.
| A．the top is | B．with its top |
| C．whose top | D．the top of which be |
The boss _____ the workers how to do it, or the accident couldn’t have happened.
| A．can’t have told | B．ought to tell |
| C．could have told | D．mustn’t have told |