Misc: In what year did Sir Ernest Swinton invent the military tank?

Questions

Camel milk is the only milk that doesn't curdle when ----------?

The average giraffe's ---------- is two or three times that of a healthy man.?

Mother prairie dogs will nurse their young only while ---------- in the safety of the burrow. If an infant tries to suckle above ground, the mother will slap it.?

---------- have the best eyesight of any breed of dog.?

---------- have three eyelids to protect themselves from blowing sand.?