48.D 49.C 50.C
由第一段第五、六、七句可知，他越来越胖，几乎不能上楼了，并且做家务和步行都感到累，故选D。
由第一段第八句He was worried about it and had to go to a doctor.可知。 由第二段最后一句To move your head from side to side when you are invited to dinner.可知，实际上医生是在劝告他拒绝邀请。
V.
51.matter 52.teeth 53.knives 54.passengers 55.almost 56.importance 57.risks 58.decision 59.themselves 60.temperature VI.
61.moving without是介词，后接动词-ing形式。 62.go have to为情态动词，其后接动词原形。 63.yourself 句意：你不应该总想着你自己。 64.to visit expect to do sth.意为“期望做某事”。 65.not to wait tell sb. not to do sth.意为“告诉某人不做某事”。 66.to help agree to do sth.意为“同意做某事”。 67.habits 我们应该摒弃坏习惯。
68.important 由be动词is可知应用importance的形容词形式important。 69.swimming keep on doing sth.意为“继续做某事，一直做某事”。 70.climbing mind doing sth.意为“介意做某事”。 Ⅶ.
71.great enough, to 72.saw, writing 73.Why don’t
74.What should, do
Ⅷ.One possible version:
Jack is my friend. He likes playing computer games very much. He often sits in the same way for too long without moving. Now he has a headache, sore eyes and a sore back. He doesn’t sleep well at night, so he feels tired every day.
I think he should take breaks away from the computer. He shouldn’t use the computer for a long time. He should do eye exercises to relax his eyes and go to bed early at night.
I think if he has a good rest, he will feel well soon.
相关推荐：
loading