There is probably no sound in (1) more chilling than the " hiss " of a diamondback rattlesnake. There is good reason: the western diamondback has killed more humans than (2) snake. It is easily excitable, very aggressive, frequently hungry, and deadly poisonous. Yet it doesn’t really hiss. Rather, it (3) its tail. A mature rattler can move its tail up and down between fifty and a hundred times a second! The hollow rattles (4) the tail, beating against each other, create the "hissing" sound.
Why does this creature (5) rattles Rattlesnakes molt three times a year, shedding their outer layer of skin each time. But the molting skin near the tail is not discarded. (6) it hardens and hollows out, becoming another rattle. If a snake had never lost any rattles, you could (7) its age by counting them and dividing by three.
Do the snakes need their rattles The rattles cannot be used in
A. because of
B. due to
C. for
D. so
There is probably no sound in (1) more chilling than the " hiss " of a diamondback rattlesnake. There is good reason: the western diamondback has killed more humans than (2) snake. It is easily excitable, very aggressive, frequently hungry, and deadly poisonous. Yet it doesn’t really hiss. Rather, it (3) its tail. A mature rattler can move its tail up and down between fifty and a hundred times a second! The hollow rattles (4) the tail, beating against each other, create the "hissing" sound.
Why does this creature (5) rattles Rattlesnakes molt three times a year, shedding their outer layer of skin each time. But the molting skin near the tail is not discarded. (6) it hardens and hollows out, becoming another rattle. If a snake had never lost any rattles, you could (7) its age by counting them and dividing by three.
Do the snakes need their rattles The rattles cannot be used in
A. person
B. nature
C. forest
D. zoo
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