.
I have ________ all my papers but I still can’t find my notes.
| A．looked through | B．looked for | C．looked after | D．looked out |
─What are you reading, Jane?
─Some books on ________ education, I’m now interested in ________ education of young people.
| A．an; the | B．/; the | C．the; an | D．an；/ |
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 |