Perhaps the customer has ____ his monthly statement and not paid the bill.

—Have you finished the work?

—Not yet, but no matter how hard it is, we'll keep ___ until we make it.

Human beings are superior to animals _____ they can use language as a tool tocommunicate.

_____ their help, we would not have succeeded.

John's score on the test is the highest in the class ; he____last night.

Due to the bad weather the plane was ____ for two hours.

Mrs. White has _____ that she is not able to get a job.

With one leg broken in that car accident, he cannot even walk, ____ run.

- We haven’t heard from Jane for a long time.

-What do you suppose_____ to her?

I ______ that I were a bird.