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 res workers understand how much damage(3) __ and (4)__ where the victims are. these planeswork(5) ___ between 30 and 120 metres in the air and they can rescue people in houses or somewhere very dangerous. GIÚP MIK NHA, THANKS, AI NHANH MIK TICK CHO
1. is
2. problem
3. on what
4. ( ko điền gì cả )
5. about