题目内容：

    One year, a newspaper of the United States published an announcement -the Horticultural Institute offered a reward at a high price for the pure white marigold(金盏花). The high reward attracted so many people, but in nature besides golden, the marigold is brown； it is not easy to create the white one. So after they were excited for a time, many people forgot that announcement.

One normal day after 20 years, the Horticultural Institute accidentally received a letter and 100 seeds of pure white marigold. On that day the news spread like wildfire. It proved to be an old woman of over 70 years old. The institute had always been hesitating over the fact that the letter stated with certainty that the seeds could bloom pure white marigold.

Those seeds finally took root in the earth. The wonder appeared after one year: large fields of pure white marigold swung in the light wind. As a result, the old woman became a new focus.

Originally, the old woman was just a flower-lover. When she happened to read the announcement 20 years ago, her heart kept beating wildly. But her eight children all opposed her decision. After all, a woman who never knew the seed genetics(遗传学) couldn't complete what the experts could never accomplish! Still, the old woman didn't change her mind and went on working. Year after year, through many cycles of spring sowing and autumn harvest, the old woman's husband died; her children flew far and high; a lot of things happened in her life but only the desire to grow the pure white marigold took root in her heart. Finally, after 20 years on the day we all know, in the garden, she saw a marigold, which was not nearly white but as white as silver or snow.

Such a difficult problem as even experts couldn't deal with was readily solved by an old woman who didn't understand genetics. Was it a wonder? Take root in the heart and even the most common seed can grow into a wonder!

1.Why was a great reward offered by the Horticultural Institute?

A.White flowers could be sold at a higher price.

B.Pure white marigold was more beautiful in nature.

C.It was very difficult to develop pure white marigold.

D.Scientists wanted to know how marigold grew in nature.

2.What can we know about the old woman from the passage?

A.She got professional support from scientists.

B.She kept trying for years before she succeeded.

C.She was 70 when she first read the announcement.

D.She sent pure white marigold flowers to the institute.

3.The underlined word “readily” in the last paragraph probably means .

A.easily B.quickly

C.willingly D.luckily

4.What is the best title for the text?

A.Seeds Take Root in the Heart B.White Marigold is Hard to Grow

C.Marigolds Grow from Bravery D.White Flowers Bring Success