（1）乔治·华盛顿是美国的首任总统。

George Washington was     of the USA.

（2）墙上挂着一个大风筝。

There is a big kite     .

（3）买这栋房子真是太贵了。

was expensive   this house.

（4）太晚了。你现在必须回学校去。

It's too late. You must to the school now.

（5）总有一天, 人们可以去月球上看一看。

  , people can have a look on the moon.