As we grow older, birthdays seem to more quickly than when we were children.
| A．come in | B．come around | C．come out | D．come over |
The limits of a person’s intelligence, generally speaking, are fixed at birth, but ________he reaches these limits will depend on his environment.
| A．where | B．whether | C．that | D．why |
The police still haven’t found the lost child, but they’re doing all they .
| A．can | B．may | C．must | D．should |
They are broadening the bridge to ________ the flow of traffic.
| A．put off | B．speed up | C．turn on | D．work out |
There are a small number of people involved, possibly ______twenty.
| A．as few as | B．as little as | C．as many as | D．as much as |
Only after Mary read her essay the second time the spelling mistake.
| A．did she notice. | B．she notice. |
| C．does she notice | D．she has noticed |