—Hey，can I ask you a favor?
—Sure，________
| A．here you are. |
| B．just as I thought. |
| C．how is it going? |
| D．what can I do for you? |
Failure is one thing; it counts to find out your faults lie.
| A．what | B．which | C．where | D．how |
Not until he walked into the classroom that he left his dictionary at home.
| A．did he find | B．had he found |
| C．he had found | D．he found |
it has turned out, there was no need to worry about their safety.
| A．While | B．As if |
| C．Now that | D．As |
Having arrived at the destination, we were shown around they had lived before.
| A．what | B．that | C．in which | D．where |
I have learned from my bitter experience we don’t know
we’ve got until it’s gone.
| A．that; that | B．what; what |
| C．that; what | D．which; that |