At times the balance in nature is ______ , resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |
Peter ____ come with us tonight , but he is not very sure yet .
| A．must | B．may | C．can | D．will |
I can''t find Jane anywhere in the office building . Where ____ she have gone ?
| A．must | B．can | C．should | D．need |
There were already five people in the car but they managed to take me as well . It ____ a comfortable journey .
| A．can''t e | B．shouldn''t be | C．mustn''t have been | D．couldn''t have been |
Mary ____ be in Paris . I saw her a few minutes ago .
| A．mustn''t | B．shouldn''t | C．can''t | D．may not |
You are wet through . You ____ in the rain .
| A．must come | B．must be caught | C．must have caught | D．must have got caught |