学习目标：
知识与技能：To learn to use ‘It is + adjective + that’ strucutre
过程与方法：What do you think of ‘Trailwalker’? Is it tough? If you want to join it, you must have strong bodies. So it’s necessary that you start training a few months before the walk.
We use ‘It is + adjective + that’ structure to say how we feel about something.
情感态度价值观：It is + adjective + that表达感觉
教学重点：say how we feel about something.
Teaching procedures
课中导学
Step 1 Presenting the structure
