5. Kunming is          (call) the City of Eternal Spring,because it feels like spring all the year round.

4. It’s     (possible) for me to be there before eight. It’s ten to eight now.

3. I won’t go to Mount Tai because I        (be) there twice.

2. So far none of us     (know) the teacher’s name.

1. It is hard        (say) who will win the game.

5.无法想象宇宙有多大。

It is      to imagine           the universe is.

4.为什么没有人和我们联系呢？

Why has no one           us?

3.太阳和它的行星叫做太阳系。

The sun and its planets        the solar system.

2.在我们的星系中有几十亿颗星星。

There are           stars in our galaxy.

1.地球是一颗行星，它绕着太阳转。

The earth is a planet and it        the sun.