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 {#blank#}1{#/blank#} （一月）.
I want to visit{#blank#}2{#/blank#} （自然的）sights this summer holiday.
More than fifty countries have {#blank#}3{#/blank#} （加入）the Asian Infrastructure Investment Bank so far.
It is a good habit to brush your teeth at least {#blank#}4{#/blank#} （两次）a day.
The little child is too young, but he{#blank#}5{#/blank#} （穿衣）himself every day.
In most countries, people usually eat {#blank#}6{#/blank#} （传统的）food on special holidays.
From the show Running Man, we can learn the {#blank#}7{#/blank#} （重要性）of team spirits.
He is the tallest one{#blank#}8{#/blank#} （在……当中）the boys.
It's impossible to {#blank#}9{#/blank#} （分离）Diaoyu Island from China.
Gas is now{#blank#}10{#/blank#} （普遍地）used for cooking and heating.
