The question is ______can be put into practice.
| A．how you have learned | B．how what you have learned |
| C．that why you have learned | D．how that you have learned |
In the middle of the forest ________， in which we often went fishing when I was a little child.
| A．lies a deep lake | B．a deep lake does lie |
| C．a deep lake lies | D．does a deep lake lie |
So absorbed ________ in our talk that my brother took a wrong turn on the way to the airport.
| A．he was | B．was he |
| C．is he | D．he is |
Not until he went abroad for further study ________ how attached he was to his parents.
| A．that the realized | B．had he realized |
| C．did he realize | D．that he had realized |
It was during the Ming Dynasty ________ the Great Wall was repaired and extended to take on the appearance it has today.
| A．when | B．which |
| C．what | D．that |
—Are you pleased with what he has done?
—Not a bit. It couldn't be________.
| A．so bad | B．much better |
| C．any worse | D．best |