重点句型 1. make it+adj. +to do sth.句式:But spending too much timeonline is unhealthy and _makes it very difficult to focus on otherthings in life (很难在生活中的其他事情上集中精力). 2.Why not do sth.?为什么不做某事?是提建议的一种句式:Why not discuss the problem (为什么不讨论问题呢) together ?