— We did not see him at the lecture yesterday．
— You ______ him, since I went to an international conference with him．
| A．mustn’t have seen | B．can’t have seen |
| C．couldn’t see | D．needn’t have seen |
The machine is so old ___ it can’t be used any more ___ some of its parts are changed.
| A．as, unless | B．that, unless | C．that ,if | D．whether, or |
--This store has such high prices.--- I agree. Never again ___ here.
| A．I will | B．will I shop | C．I do shopping | D．I do shop |
Mary is ___ honest girl and will go to ___ college after she finishes middle school.
| A．a, a | B．an, the | C．a, the | D．an, / |
Are there any ___ things on the moon?
| A．aliving | B．live | C．alive | D．life |
They are trying to ___ money___ a wildlife project.
| A．send, with | B．collect, to | C．be collecting, for | D．collect, for |