—He was nearly drowned once.
—When was __________？
—__________ was in 1998 when he was in middle school.
| A．that ； It |
| B．this ；This |
| C．this； It |
| D．that；This |
Hardly ___________the door when he rushed into the office out of breath.
| A．I opened | B．did I open | C．I had opened | D．had I opened |
The driver was at ___ loss when ____ word came that he was forbidden to drive for speeding.
| A．a; / | B．a; the | C．the; the | D．/; / |
We want such materials ________ can bear high temperature and pressure.
| A．that | B．as | C．what | D．which |
Her sister has become a lawyer, _____she wanted to be.
| A．who | B．that | C．what | D．which |
Space exploration has been made ______ with the development of modern science and technology.
| A．it possible | B．it was possible | C．that possible | D．possible |