Mr. Smith is __________ to attend the party to be held next Wednesday.
| A．possible |
| B．probable |
| C．likely |
| D．seemingly |
He stayed there for quite a long time, during ________ time he learned much spoken English.
| A．that | B．this | C．which | D．same |
The man showed us so heavy a stone ________ no man can lift.
| A．that | B．as | C．which | D．and |
Some pictures of the river brought the days back to the old ________ they swam in it.
| A．when | B．that | C．who | D．where |
Is this research center ________ you visited the modern equipment last year?
| A．where | B．that | C．the one that | D．the one where |
The humans are destroying nature day by day, ________ of course, will cause severe punishment from it sooner or later.
| A．who | B．when | C．on which | D．which |