A.Airboats may make a very big noise. |
B.You may get lost when passing through. |
C.Paperbark trees soak up too much water there. |
D.Many different kinds of animals are to be protected. |
A.They have big propellers to move them faster than alligators. |
B.The propeller makes loud noise so as to scare alligators. |
C.Their flat bottom can skim along the water surface. |
D.They can watch alligators without hurting them. |
A.built canals and levees to stop the rivers flowing into Everglades |
B.built factories near rivers that flowed into the wetland |
C.brought Paperbark to soak up water in Everglades |
D.are cutting down these Paperbark trees |
A.that moves in from another place |
B.that enters and takes control |
C.that has been brought in |
D.that is in danger |