The scientist’s many years’ careful observation ____ a surprising discovery.
| A．ran into | B．began with | C．led to | D．came from |
Though _____ in San Francisco, Dave Mitchell had always preferred to record the plain facts of small-town life.
| A．raised | B．grown | C．developed | D．cultivated |
After the show, the crowd _____ out of the theater.
| A．poured | B．melted | C．drew | D．dismissed |
Voices were _____ as the argument between the two motorists became more bad-tempered.
| A．spoken | B．raised | C．developed | D．increased |
My brother likes eating very much but he isn't very _____ about the food he eats.
| A．special | B．peculiar | C．particular | D．unusual |
The members of the club wouldn't run a _____ in entrusting（委托） the organization to an unreliable person.
| A．danger | B．risk | C．loose | D．chance |