Is

—What day is it today, Saturday or Sunday?—____.It's Monday.

—You can see Mr. Smith if there is a sign“_____”on the  door of his shop.—Thanks.

The engineer is not happy with the project, and　　　　is her boss.

You can,　　　　the sky is clear, see as far as the old temple on top of the mountain, but not today.

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

________________________?—My brother is an engineer.

–Is there anywhere you’d like to go this summer vocation?-________

Good timing is ______ to our plans.

He is a man of great experience, ______much can be learned.

These ancient Indians used to live in ____ is now a part of the United States.