Mr. Smith doesn’t believe that his daughter can work out the problem that easily,_____?

The girl ______in red is a successful writer, who _______ Tom last month.

 All _____ can be done has already been done.

This is the very information _______ we can learn what is selling best in the market. .

 _______ the teacher’s instruction in the lab_____ important.

Such a person _____ you talked about is seldom seen now.

Controlling water-pollution is necessary_____ it will be expensive.

----_____I return the dictionary within three days?

----No, you_____. You_____ it for five days.

_____ from heart trouble for years, Professor White has to take some medicine with him wherever he goes.

 ----I _____this morning, but he could not come.

----Well, we’d better go and _____at his office.