33．形容词辨析。由句意可知天气仍然寒冷。

　　34．动词辨析。我唱着笑着干活。

　　35．动词辨析。有上下文可知干完活了我很开心。

　　36．词义辨析。由下文可知我让住在家里的孩子到外面玩耍。

　　37．词义辨析。由上下文可知是堆了个雪人。

　　38．动词搭配。Look around环顾四周；由句意可知我环顾四周看着这个雪白的世界。

　　39．上下文串联。上文说我不知道…接着说我知道…存在着转折关系。

　　40．名词辨析。根据上下文可知我们选择开心。

　　The inhalation (吸入) of asbestos particles is associated with a number of lung diseases, such as asbestosis and ___50___ cancer.

　　Asbestosis is caused by the entry of asbestos particles into the wall of the alveoli, causing scarring which limits the functioning of the lungs.

　　The lung ___51___ its elasticity and may change shape.

　　The initial symptoms of asbestosis are a tightness in the chest and breathlessness.

　　In its ___52___ stages, sufferers develop the barrel-shaped chests associated with emphysema, cyanosis, (where the skin takes a bluish ___53___ ) and club fingers.

　　Lung cancer, the generic ___54___ for malignant tumors（肿瘤）of the alveoli and bronchial tubes, has been shown to be directly ___55___ to the inhalation of asbestos particles.

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