The _______ boy made the police and his family _______.
| A．gone; puzzled | B．missing; puzzled |
| C．missing; puzzling | D．lost; puzzling |
Peter had intended to take a job in business, butthat plan after the unpleasant experience in Canada in 2010.
| A． | had abandoned | B． | abandoned | C． | abandon | D． | will abandon |
According to scientists, our mental abilities begin to______from the age of 27 after reaching the highest level at 22.
| A．differ | B．shrink | C．fail | D．decline |
"It's a such nice place," Mother said as she sat at the table________ for customs.
| A．to be reserved | B．Living reserved | C．reserving | D．reserved |
The research lacks evidence, and therefore, its conclusions are doubtful.
| A．solid | B．fierce | C．severe | D．potential |
We live in an age more information is available with greater ease than ever before.
| A．why | B．when | C．to whom | D．on which |