My sister met him in the hospital yesterday afternoon, so he _________ your lecture.
| A． couldn’t have attended | B． needn’t have attended |
| C． mustn’t have attended | D． shouldn’t have attended |
In our class there are 46 students,half wear glasses.
| A．in whom | B．in them | C．of whom | D．of them |
All the photographs in this book,stated otherwise, date from the 1950s.
| A．unless | B．until | C．once | D．if |
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 |