Because of _______ high demand for Type O blood, _______ supplies of it available in blood banks are usually limited.
| A．a; the | B．the; the | C．/; the | D．/; / |
— How about your journey to Mount Emei?
— Everything was wonderful except that our car _______ twice on the way.
| A．slowed down | B．broke down | C．got down | D．put down |
The students ________ from the whole class are expected to bring us honor in this school sport meeting.
| A．selecting | B．selected |
| C．to select | D．having selected |
_________ you take an active part in physical activity ______ be able to keep fit and stay healthy.
| A．Only if; you will | B．Only if; will you |
| C．Unless; you will | D．Unless; will you |
The entire hall burst into a great cheer and applause _______ the Nobel Prize winner appeared on the stage accompanied by the chairman.
| A．until | B．while | C．by the time | D．the moment |
When I entered the room I found my father _______ in the sofa and __________ in a magazine.
| A．seated; absorbed | B．sit; absorb |
| C．sat; absorbed | D．sitting; absorbing |