题目内容：

    A small insect is gettinga lot of attention in the United States. The rusty patched bumblebee (大黄蜂) is the first of its species to be declared endangered in the lower 48 states — meaning every state except Alaska and Hawaii. The rusty patched bumblebee is named for a rust-colored line on its back.

The U.S. Fish and Wildlife Service announced this month it was adding the bee to its endangered species list. The insects are "on the brink of extinction, " according to the service. It said the bees were once found in 28 states. But there now are only small populations remaining in 13 states. The government agency will make a plan to help the dying bees recover. The agency said that such a plan might help other insects,like butterflies.

U.S. officials think land owners can take small steps to help the rusty patched bumblebee. They say land owners can be friendlier towards bees by using native plants in their gardens. The insects directly fertilize many kinds of fruit and vegetable crops. And they fertilize grain crops used to feed cattle and milk cows. It costs billions of dollars to duplicate the job the bees do for free. Land owners are also being urged to cut back on their use of pesticide products. The officials also suggest that gardeners leave their plants alone at the end of the summer instead of cutting them. That way, the bees will have a place to live over the winter.

The Fish and Wildlife Service says the rusty patched bumblebee was added to the endangered species list partly because of habitat loss. Other reasons were disease, pesticides and climate change. Officials are worried that other bees will suffer, too. Another species of bees in Hawaii is also endangered.

1.How many states declared the rusty patched bumblebee endangered?

A.13. B.28. C.48. D.50.

2.Which one is harmful to the rusty patched bumblebee?

A.Planting native plants. B.Reducing the use of pesticide products.

C.Leaving plants alone. D.Cutting out plants regularly.

3.What can we know about the rusty patched bumblebee according to the text?

A.All the states declared it as endangered species.

B.It is named for a rust-colored line on its belly.

C.It is beneficial to land owners.

D.It is endangered mainly because of habitat loss.

4.What's the best title for the passage?

A.Bumblebee added to U.S. endangered species list

B.Why is bumblebee on the brink of extinction

C.Take steps to help bumblebee

D.The benefits of protecting bumblebee