________ several times，he still couldn't understand how to operate the machine.
| A．Telling | B．Having told |
| C．To be told | D．Having been told |
The room was decorated gold and jewels.
| A．on | B．at | C．with | D．by |
The old man told us an story.
| A．amaze | B．amazing | C．amazed | D．amazement |
I don’t like the way he talks and laughs.
| A．which | B．when | C．in which | D．for which |
He was generous with his time, ______ I was grateful..
| A．for which | B．at which | C．with which | D．with which |
Until today we have reached a stage ______ we have almost no rights at all..
| A．why | B．what | C．how | D．where |