.
Don't ________ the drug on animals.
A try out B watch out C make out D take out
I didn’t see her in the meeting room this morning. She _____ at the meeting.
| A．mustn’t have spoken | B．shouldn’t have spoken |
| C．needn’t have spoken | D．couldn’t have spoken |
You _____ to the meeting this afternoon if you have something important to do.
| A．needn’t to come | B．don’t need come | C．don’t need coming | D．needn’t come |
Alexander Granham Bell invented ___ telephone in 1876.
| A．/ | B．a | C．the | D．one |
The little boy wishes to be ___.
| A．a Lei Feng | B．the Lei Feng | C．Lei Feng | D．an Lei Feng |
--How do you pay the waitress? ---As a rule, they are paid ____.
| A．by hour | B．by the hour | C．by an hour | D．by hours |