Read the passage and choose the correct answer A, C, C or D.

Rescue robots ___(1)___ hi-tech toys, but we are now using more robotic planes, helicopters. We can use them after storms, earthquakes, or fires to provide us with important ___(2)___. They have cameras and microphones that help rescue workers understand how much damage ___(3)___ and ___(4)___ where the victims are. These planes work ___(5)___ between 30 and 120 metres in the air and they can rescue people in somewhere very dangerous.