单词拼写（共10小题， 计10分）
根据句意及汉语提示，填写句中所缺的单词。
I haven’t heard from him since last _______（一月）.
I want to visit ______（自然的）sights this summer holiday.
More than fifty countries have ______（加入）the Asian Infrastructure Investment Bank so far.
It is a good habit to brush your teeth at least ______（两次）a day.
The little child is too young, but he _____（穿衣）himself every day.
In most countries, people usually eat _______（传统的）food on special holidays.
From the show Running Man, we can learn the ________（重要性）of team spirits.
He is the tallest one _______（在……当中）the boys.
It’s impossible to _______（分离）Diaoyu Island from China.
Gas is now _____（普遍地）used for cooking and heating.