The day ________ the hospital was opened was October 1st, 1970.

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The couple ________ leaving for Qingdao for a holiday.

[　　]

The girl cuts the apple ________ half and gives her parents each.

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He walked more slowly ________ faster.

[　　]

The boy was born ________ a small village ________ May 1,1998.

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It ________ several months ________ he is fit for work.

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In order to find radium she did ________ in the lab for four years.

[　　]

A．an experiment and an experiment

B．experiment after experiment

C．the experiment and the experiment

D．experiments and experiments

I hear he will go ________ next week.

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I was ________ the stairs all day answering the door.

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When she saw the ________ tiger, her face turned pale ________.

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A．frightening, with fear

B．frightened, with fear

C．frightening, at fear

D．frightened, at fear