A.memorials with trees and other plants around them |
B.buildings with trees and other plants around them |
C.museums with trees and other plants for scientific and educational purposes |
D.places with trees and other plants for scientific and educational purposes |
A.It lies to the northeast part of Washington, free to visit it. |
B.In fact it is a short walk from Metrorail, the local train system. |
C.It is surprising and attractive. |
D.It is where the United States Department of Agriculture’s Agricultural Research Service is. |
A.To protect and study about nine thousand different kinds of plants there. |
B.To make it a popular stop for visitors to Washington. |
C.To grow trees for Christmas. |
D.To improve the environment. |
A.Five. | B.Six. | C.Seven. | D.Eight. |