The mother wondered where the boy ________.

[　　]

No one can be sure ________ in a million years.

[　　]

I'm afraid I can't afford it. You see, I don't have much money ________ now.

[　　]

After the operation, he began to ________ day by day.

[　　]

The little boy ate ________ his mother gave him.

[　　]

You simply can't imagine that rats eat 40 to 50 times ________.

[　　]

By the time he ________ the railway station, the train ________.

[　　]

Today the Central Department Store is on sale. Many things have ________ prices.

[　　]

________ action is finally agreed on will come too late for many of the suffering people in Iraq.

[　　]

We all think ________ our duty ________ tidy the lab after the experiment.

[　　]