完成句子 按所给的汉语，用英语完成下列句子，并将答案写在答题卡标有题号的横线上。
(1)周末他宁可去爬山，也不愿去徒步旅行。
He ____ than hiking at weekends.
(2)多数人不容易戒掉自己的坏习惯。
It is not easy____ their own bad habits.
(3)我们都难以想象这个小孩处理这样的问题有多大的困难。
We can't imagine the great difficulty the child has ____ .
(4)开始两个月这些外国学生不适应这儿的生活。
These foreign students ____ the life here in the first two months.
(5)他的新书密切关注了青少年和他们的家长之间的沟通技巧。
His new book ____ the skills of the communication between teenagers and their parents.
(6)我想知道你的收音机买了有多久了。
I wonder how long ____ .
