– Mary was crying sadly.
-- Oh, she ________ the bad news that her mother was badly injured in the accident.
| A．must know | B．might have known | C．must have known | D．should have known |
While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
| A．occasionally | B．simultaneously | C．eventually | D．directly |
The noise was so _____ that only those with excellent hearing were aware of it.
| A．dim | B．soft | C．faint | D．gentle |
If he refuses to _____ my plan, I can probably find someone more cooperative.
| A．put up with | B．fall in with | C．do away with | D．get along with |
Some people either _____ avoid questions of right and wrong or remain neutral about them.
| A．violently | B．sincerely | C．properly | D．deliberately |
His landlady gave him a week's _____ to leave the flat.
| A．threat | B．notice | C．advice | D．caution |