Reading is fun and helps you know __________ about the world

词义替换。—What do you often do in your spare time?—Play basketball. 

— Shall we go and ________ hello to the foreign teachers? — Good idea! Let’s go.

Many wild animals don’t have a safe place to live, ___________people are taking away their land and forests.

Usually, a mother wolf gives birth to five to seven baby wolves 　　　.