A．Not  | B．Doesn't | C．Don't | D．Aren't |
| A．they | B．them | C．we | D．she |
| A．It means you must keep from the grass |
| B．It means you must keep off the grass |
| C．They mean you shouldn't keep off the grass |
| D．They mean you should keep from the grass |
A．needn't  | B．mustn't | C．can't | D．may not |
| A．looked at；see | B．looked；look | C．looked at；looked | D．looked；see |
| A．in | B．on | C．for | D．to |
| A．first |
| B．second |
| C．last |
| D．third |
| A．get | B．visit | C．listen | D．look |
| A．half past two | B．two o'clock | C．two thirty | D．two fifteen |
| A．arrive at | B．get to | C．reach | D．arrive |
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