在下列各句的每个空格内填上一个适当的完整的单词，该词的首字母已给出。
①Remember always be p____   with these poor kids. They need our care and love.
②Don't l____ heart when you are in danger.
③The man p____  the sick child with some food last night, and now the boy is much better.
④Hope Project has sent many s____  designed(设计) computers to some schools in poor areas.
⑤The teenagers in the 21st c____  are much more different as we thought.

What are you going to do ____ (help) the sick children?

关于经线的正确说法是（   ）