When the Greeks had _____ the Persians, a soldier ran from Marathon to Athens.
| A．won | B．bitten | C．beaten | D．hit |
Tom told us all that he said so at the meeting was really true．
| A．that | B．all | C．what | D．which |
This ischallenging job I mentioned to you the other day． Have you had anyone inmind for it now?
| A．a, the | B．the;/ | C．the, the | D．a:/ |
In such a background, his white hair was particularlyhis dark skin．
| A．in relation to | B．in need of | C．in contrast to | D．in favor of |
The black baby boy is at the stagehe can only say a few simple words but not yet full sentences．
| A．when | B．where | C．which | D．why |
Up to now, no one has come up with a（n）explanation of why dinosaurs died out, and it remains a mystery．
| A．astonishing | B．amusing | C．convincing | D．puzzling |