根据汉语提示，完成下列单词的拼写，使句意通顺。

小题1:When you cross the road, you must pay attention to your s_____（安全）.

小题2:There’s no d      that computers are widely used by workers.

小题3:Going to Australia for further education for two month is a very e________(高兴的) and exciting experience for me.

小题4:A car e______ will be held in April in Shanghai. You can see many different kinds of cars.

小题5:No matter where the pop star goes, the fans will f______ him.

焊接残余变形的主要表现形式是什么？