Choose the correct answer

This new home robot has three programmes: it can (1)_______ the house, it can clean(2)________ floor and it can interact (3)________people. Kitty 2012 is fast and intelligent. When we’re away, it can listen for certain noises and send signals to our mobile phone if there’s trouble (4)________ danger. It can move around the house and climb steps to find dirty places and clean them. It has cameras in its eyes so (5)_________ can watch people and react to them.
 
1. A. guard B. look C. wake D. prevent
2. A. the B. a C. an D. any
3. A. to B. on C. at D. with
4. A. but B. so C. or D. as
5. A. they B. it C. we D. she