There is no doubt _______he will come tomorrow, but I do doubt _____he will come on time.
| A．that; that | B．that; whether |
| C．whether; whether | D．whether; that |
—Tom has been fired by his boss.
—________？As far as I know，he is a hardworking and considerate fellow.
| A．Why not | B．How come |
| C．What then | D．So what |
Annoyed by the salesman's bad manner，John chose ________of the two computers on sale and left.
| A．all | B．either |
| C．neither | D．none |
People develop ________ preference for a particular style of learning at ________ early age and these preferences affect learning.
| A．a；an | B．a；不填 |
| C．不填；the | D．the；an |
Four and ________ half hours of discussion took us up to midnight，and ________ break for cheese，chocolate and tea with sugar.
| A．a；a | B．the；the |
| C．不填；the | D．a；不填 |
Animals are obviously________lower form of life than________man.
| A．a；/ | B．the；the |
| C．a；the | D．/；/ |