Warming up questions

1. If you find a two-year-old boy is trying to put a key into a box, will you help him immediately? 

2. Which way did you prefer when you were in trouble, such as in your study or in using some new devices, turning to someone else for help, or exploring by yourselves even if you might fail again and again？

1. theme introduction

2. contrast 

Contrast and comparison

A contrast brings out the differences between two or more things of  the same kind, while a comparison the similarities between them.