Andy is my brother. ______ often takes ______ dog for a walk in the park.

I found many people ________ on the benches at the endof the day，chatting

How I wish every family ______ a large house with a beautiful garden!

_____she forgets to bring what

Is air the lightest thing in the world?– Not .Scientists from Zhejiang University have just developed the world’s lightestmaterial.