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 |
Violent programs on television may have a bad _____ on children.
| A．affection | B．pressure | C．influence | D．control |
.Maria is a _____ person and never makes any unreasonable demands.
| A．sensitive | B．sensible | C．obedient | D．jealous |
. There was a large box behind the door and Peter couldn't _____ falling over it in the darkness.
| A．help | B．resist | C．avoid | D．prevent |
When the Greeks had _____ the Persians, a soldier ran from Marathon to Athens.
| A．won | B．bitten | C．beaten | D．hit |
Children are likely to get _____ if no one cares about their upbringing.
| A．out of hand | B．out of order |
| C．out of place | D．out of work |