Ai bt giải thì giải giùm nik vs ạ. Cảm ơn nhìu

3. Alex kept in touch with his parents while traveling abroad. 
make regular calls to = kept in touch with: giữ liên lạc, thường xuyên liên lạc

4. Our aim is to put an end to/put a stop to violent crime in this area. 
stamp out = put an end to = put a stop to: chấm dứt

5. I don't feel like to go to my piano lesson today.  
don't want to = don't feel like to: cảm thấy không muốn