It never occurred to humans until the mid-1990s ______ some animals can be cloned.
| A．where | B．that | C．when | D．what |
You can find Joe’s house easily because his house is _________ from others’ in the street by its pink walls and large windows.
| A．classified | B．monitored |
| C．associated | D．distinguished |
It’s widely admitted that the _________ of our sports system, rather than just foreign coaches, will be helpful to Chinese football.
| A．extension | B．assumption |
| C．reform | D．authority |
We express our thoughts not only ________ words, but also body language.
| A．in terms of | B．in spite of |
| C．in preparation of | D．in case of |
A wonderful idea ________ me that day when I met with a tough problem，.
| A．happened to | B．occurred to |
| C．seemed to | D．compared to |
Between 1918 and 1938, many new stations were constructed,__________ was designed by an architect named Charles Holden.
| A．the most famous of which |
| B．the most famous of them |
| C．the most famous of whom |
| D．and the most famous of which |