---You _________to our Mom like that. It was awfully impolite.
---You are right. I must have been crazy at that moment.
| A．mustn’t have talked | B．needn’t have talked |
| C．shouldn’t have talked | D．may not have talked |
---- Is Mary coming to the concert?
---- I think ________.
| A．yes | B．it | C．that | D．so |
---- Have you been here long?
---- _______.
| A．No, not very long | B．Not much long |
| C．Yes, only little long | D．No, only yesterday |
________ mud on his trousers brushes off easily.
| A．Drying | B．Having dried | C．Being dry | D．Dried |
The young lady was careful _________.
| A．not repeating her mistake | B．not repeated her mistake |
| C．to not repeat her mistake | D．never to repeat her mistake |
Though they had a meeting yesterday, there is still much that remains______.
| A．to solve | B．to be solved | C．solving | D．solved |