______ as the “First Lady of Speech”, Dr Lillian Glass is recognized as one of the world’s leading experts on communication skills.
| A．Knowing | B．Having known | C．Known | D．To be known |
You _______ be tired—you’ve only been working for an hour.
| A．must not | B．won’t |
| C．can’t | D．may not |
The engineers must have worked out the design by the end of last week，_______？
| A．mustn’t they | B．hadn’t they |
| C．haven’t they | D．didn’t they |
It rained a lot during their journey,so they _______ have had a good time.
| A．can’t | B．must |
| C．shouldn’t | D．might |
—Isn’t that Ann’s husband over there?
—No, it _______ be him—I’m sure he doesn’t wear glasses.
| A．can’t | B．must not |
| C．won’t | D．may not |
We hope that as many as possible _______ join us for the picnic tomorrow.
| A．need | B．must |
| C．should | D．can |