People were perhaps more honest a long time ago when life was very different from _________ it is today.
| A．which | B．that | C．what | D．how |
____ we know now, oceans cover more than 70 percent of the earth.
| A．That | B．Which | C．As | D．What |
We must teach her a good lesson ___ she likes it or not.
| A．whether | B．if | C．that | D．which |
We don't know ___ to pay a visit to the old town.
| A．whether | B．if | C．that | D．which |
The question __ we will hold the sports-meet next Sunday will be decided very soon.
| A．that | B．whether | C．if | D．why |
We were very much surprised at the way ___ she treated the old woman.
| A．on which | B．by which | C．to which | D．in which |