______ I know the money is safe, I shall not worry about it.

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He made a mistake, but then he corrected the situation ______ it got worse.

[　　]

Don't be afraid of asking for help ______ it is needed.

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The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed ______ my memory.

[　　]

When we arrived at the cinema, we were surprised to find the audience ______ leaving their seats.

[　　]

It is ______ my power to understand how the computer works.

[　　]

This film is based ______ a real story.

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--Tonight the blind boy will perform ______ the piano at the party.

--Great!He succeeded at last! He's performed ______ a wonder.

[　　]

The medicine he had taken _____ the blood.

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A．has had effect on

B．had a bad effect on

C．has a bad effect on

D．had bad effect on

The writer added that he would add one more character ______ his novel before it came out.

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