Have you received Jack’s plan?— Yes, but I don’t think his plan is ______.

I my English book.Look! Is that your English book in the lost and found box.

How are you getting along your work? －Very well, thank you.[ ]

He ran the 100 meters in 9.91 seconds, and I have not seen _________ this year.

Could you tell me_________?—He is in the library．