present…to… ________

It ________（花费）eleven hours to fly from Canada to China today.

I hope someone will invent a ________（运输车）that can send us from one place to another instantly.

We know the sunlight is a kind of ________（能量）that costs little. We should make full use of it.

Many boys like to play ________（滑板）because they think it's fun.

The ________（宇宙飞船）without people have already been to the moon.