根据句子意思及所给的词首字母或汉语提示，完成下列单词。（5分）

小题1:Some people                (浪费) food while others don’t have enough food to eat.

小题2:Linlin is good at English, but I’m w               in it.

小题3: In the past, few children had the chance to receive a good              （教育）.

小题4:—Have you ever been a             _?

—No, I have never been to any foreign country.

小题5:You can’t learn English well u               you work hard.

电缆硫化温度一般为155～160℃，恒温30min才可打开硫化器。