`1. A`

`->` $guard (v)$: canh gác, trông coi

`=>` phù hợp với nghĩa của câu.

`2. B`

`->` Cấu trúc: interact with: tương tác với

`3. C`

`->` send signals: gửi tín hiệu

`4. D` 

`->` move around: di chuyển quanh 

`5. A`

`->` Chỉ chung nhiều người.

Xin ctlhn ạ!

This new home robot has three programmes: it can guard and it can interact  with 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 or danger. It can move for the house and climb steps to find dirty places and clean them. It has cameras in its eyes so it can watch people and react to them.