30. At 60 the famous film star Dustin Hoffman is at a point in his art career _______ the chances are narrowing but the roles seem stronger.
| A．where | B．that | C．which | D．when |
Listen! Do you hear someone for help?
| A．calling | B．call | C．to call | D．called |
Cindy shut the door heavily and burst into tears. No one in the office knew she was so angry.
| A．where | B．whether | C．that | D．why |
I'm tired out. I all afternoon and I don't seem to have finished anything.
| A．shopped | B．have shopped |
| C．had shopped | D．have been shopping |
Listening to loud music at rock concerts caused hearing loss in some teenagers.
| A．is | B．are | C．has | D．have |
Tim is in good shape physically he doesn't get much exercise.
| A．if | B．even though | C．unless | D．as long as |