My friend and I often ______ the waves on our surfboard.

the interaction between people, rather than theevents __ occur in their lives, __ is the main focus of social psychology.

Li Ping ________some Guangdong dialect while traveling there with his family this spring. [ ]

He always tells funny things to me and ________.

____you are familiar with the author’s ideas, try reading all the sections as quickly as you possibly can