–Do we have to talk with Jack about that matter?–Yes, I think we __________.

If you are in the zoo, remember not to touch or go near the animals. Although some of the animals are cute, you _________ leave them alone. 

.--Your parents were anxious about you. You _____ home without saying a word. -- It’s my fault.

––– I promise my daughter ____ get a nice present on her birthday. ––– I think it will be a big surprise to her.

 --- Is John coming by train?--- He should, but he _______ not. He likes driving his car.