根据汉语提示，完成下列单词的拼写，使句意通顺。

小题1:I need some________(志愿者) to clean up the park.

小题2:The Great Britain______( 由……组成 ) of four parts: England, Scotland, Wales and North Ireland．

小题3:Henry, don’t shout so n_____（吵闹地）in public.

小题4:You won’t pass the driving test u           you practise more.

小题5:—The twins can speak excellent Chinese.Who taught them？

—Nobody. They learned it by        （自己）.

连续铸锭的方法有哪几种？