I’d love to join in your visit to a local museum today, but I’m on a very tight ________ -I’ve got a lot of work to do today.

35. Do you know who ________ using water in this way?

I’m really very busy，otherwise I ________ certainly go there with you.

Tony, ______his father, ____ walking from home to school.

We _____ each other the best of luck in the exam.