Train tickets are allowed to be booked online or by phone, a good way to make purchasing train tickets more________.
| A．systematic | B．effective |
| C．accessible | D．practical |
The experiment turned out to be__________failure, but “________failure goes before success”
A a , a B /, / C a , / D / , a
.Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
| A．which. | B．whether | C．what | D．that. |
. We all hope that the flame will not _____ in such cold weather.
| A．die out | B．die off | C．die down | D．die away. |
You are not in good health, I think. You could improve your _____ by running every day.
| A．position | B．condition | C．situation | D．energy. |
You can do whatever you like _______ you follow the school rules..
| A．on condition | B．on condition that | C．on this condition | D．on condition if |