—Sorry, I made a mistake again.
— Practice more and you’ll succeed.
| A．Never mind | B．Certainly not |
| C．Not at all | D．Don’t mention it |
___sign the contract unless you are sure you understand it.
| A．In no case should |
| B．In any case you should |
| C．In no case should you |
| D．In any case should you |
Eyewitness provides an evidence that he was ___ of the crime.
| A．guilty |
| B．concerned |
| C．cautious |
| D．mistaken |
Wash your hands with soap and water ___ after each contact with the sick person.
| A．occasionally |
| B．thoroughly |
| C．scarely |
| D．enough |
After the fun he has had during the holidays, the boy can’t ___ on his schoolwork.
| A．try |
| B．concentrate |
| C．take |
| D．depend |
Jim went to answer the phone. ___, Harry started to prepare lunch.
| A．However |
| B．Nevertheless |
| C．Besides |
| D．Meanwhile |