The young man went into the cinema and after ____ seemed half an hour he came out.
| A．that | B．it | C．what | D．which |
By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _______appeared a rare rainbow soon.
| A．of which | B．on which | C．from which | D．above which |
Yesterday she sold her car, ______ she bought a month ago.
| A．when | B．where | C．that | D．which |
The Science Museum, ________ we visited during a recent trip to Britain, is one of London’s tourist attractions.
| A．which | B．what | C．that | D．where |
The book was written in 1946, ____ the education system has witnessed great charges.
| A．when | B．during which | C．since then | D．since when |
Some pre-school children go to a day care center,____ they learn simple games and songs.
| A．then | B．there | C．while | D．where |