5. From this story, you can have some idea ______ can be used in reality.
| A．that you have learned | B．how what you have learned |
| C．how that you have learned | D．how you have learned |
Whenever you are to walk on the ice,__________ that it is solid and safe enough.
| A．examine | B．check | C．try | D．make |
It is a __________ that you missed such a wonderful concert.
| A．shame | B．pity | C．regret | D．mistake |
Because of the snow,many parts of the countryside are only _________ by helicopter.
| A．available | B．appropriate | C．accessible | D．achievable |
I tried hard to get some information about the new technology out of his mouth,but he remained __________.
| A．quiet | B．secret | C．silent | D．calm |
It is reported that heatrelated deaths are __________ due to brain damage.
| A．rather | B．very | C．quickly | D．largely |