Start out right away, ________ you’ll miss the first train.
| A．and | B．but | C．or | D．while |
Mr. White, who comes from ________ European country, has formed ________ habit of attending ________ church on Sundays.
| A．an; /; the | B．a; the; / |
| C．an; the; / | D．a; a; a |
Because of ________ high demand for Type AB blood, ________ supplies of it are usually limited.
| A．the; the | B．不填；不填 |
| C．不填；the | D．a; the |
I didn’t make sense of ________ poem until I read it ________ third time.
| A．the; the | B．a; the |
| C．the; a | D．a, a |
It is clear that ________ little money he earns can hardly support ________family as large as his.
| A．the；a | B．a；the |
| C．/；a | D．/；the |
Cancer is ________ second only to heart disease as ________ cause of death.
| A．the; a | B．/; a |
| C．a; a | D．the; the |