Look! There are many______in the sky. I think it will be______ tomorrow.

With the introduction of the computer, there is no complicated problem ________ can be solved in a few hours

Can I pay the bill by check—Sorry, sir. But it is the management rules of our hotel that payment be made in cash.

This is not an economical way to get more water; _________,it is very expensive

When and where shall we meet tomorrow—Let’s _______ it 3:00 p. m. at my home.