The science of medicine, _______ progress has been very rapid lately, is perhaps the most important of all the sciences.
| A．to which | B．in which | C．Which | D．with which |
Every few years, the coal workers their lungs X-rayed to ensure their health.
| A．are having | B．have | C．have had | D．had had |
If our parents do everything for us children, we won't learn to depend on
.
| A．themselves | B．them | C．us | D．ourselves |
It took us quite a long time to get to the amusement park. It was journey.
| A．three hour | B．a three-hours | C．a three-hour | D．three hours |
Sean has formed the habit of joggingthe tree-lined avenue for two hours every day.
| A．between | B．along | C．below | D．with |
Although the entrance to the cave was very narrow, those visitors managed to________through it.
| A．press | B．squeeze | C．break | D．cut |