1. Watch out for these stairs which are very steep.2. Dress more to protect you from catching cold.3. This boy is smart and eager to study, but on the other hand, he is careless and often makes many mistakes.第一题 用close to就可以 不用closely to第二题 day's改为days'第三题 错得我根本就看不出来这句话想说什么意思，所以也不好改
翻译：1、Watch out the stairs。 They're too steep。2、Put on more clothes to protect you from getting cold.3、On one hand, the boy is smart and curious。 On the other hand, he is too careless and often makes mistakes.改错：1、closely改为close2、day's改为days'3、nteresting改为interested
