Is

I tried to put ____ a telephone call to him, but his line is always busy.

Now that she is out of job, Lucy ___ going back to school，but she hasn’t decided yet.

There is no ___way than sending her a gift to cheer her up because she loves gifts..

Winning or losing is temporary, but friendship ______.

Good timing is ______ to our plans.

—          . —It certainly is. The sun is shining and there is a pleasant breeze. —It's lovely.  

---Is Peter there? ---______, please. I’ll see if I can find him for you.

______ is the chief administrative official of a college or university faculty.

It is well known that teaching is a job,　　　　enough patience.

---Excuse me, sir. Where is Prof. Smith’s office?   ---_________________.