One learns a language by making mistakes and ________them．

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The picture _________ on the wall is painted by my nephew．

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The lady said she would buy a gift for her daughter with the_________.

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A．20 dollars remained

B．20 dollars to remain

C．remained 20 dollars

D．remaining 20 dollars

--Susan，go and join your sister cleaning the yard．

--Why ________? John is sitting there doing nothing．

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--You seem to have learned all the English words by heart.

--_________.

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--We ________ to the station, it is so near.

--Yes. A taxi wasn't necessary at all.

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A．needn't have walked

B．shouldn't have walked

C．could have walked

D．would walk

--Are you coming to Jeff's party?

--I'm not sure. I ________ go to the concert instead.

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--You finally passed the exam, didn't you?

--Yes, but for your help, I ________.

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A．would succeed

B．wouldn't succeed

C．would have succeeded

D．wouldn't have succeeded

--You feed the chicken, ________.

--But I did it yesterday.

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--Why does he look so sad?

--Because he has ________ by her classmates.

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