If the company wants to fire me, they have to give me three months' ________ at first.

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Computers will be one of the main subjects ________ in the middle school in our province.

[　　]

－How come a simple meal like this costs so much?

－We have ________ in your bill the cost of the dish you broke just now.

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How long ________ ?

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The boy wanted to ride his bicycle in the street, but his mother told him ________ .

[　　]

I suggested she ________ to the hospital immediately, but she insisted that she _______ quite well, then.

[　　]

Modern statesmen are often faced with ________ problems ________ defeated the ancient Romans.

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Anyone can become a better scholar if he or she ________ .

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In the dark street, there wasn't a single person ________ she could turn for help.

[　　]

________ did Arthur realize that there was danger.

[　　]

A．Upon entering the store

B．When he entered the store

C．After he had entered the store

D．Only after entering the store