用所给词的适当形式填空。1. There used to be many{#blank#}1{#/blank#} (wolf), but only a few of them remain today.
2. At present, Chinese is{#blank#}2{#/blank#} (wide) used around the world.
3. The doctor advised my father{#blank#}3{#/blank#} (not smoke) any more.
4 . We should be {#blank#}4{#/blank#} (friend) to others at any time.
5. It's reported that Chinese couples can have their{#blank#}5{#/blank#} (two) child if one of them is an only child.