Hello, Betty! Where are you now?— I ________ on the Great Wall of China and talking to you.

He walked _________ fast for us _________ catch up with（赶上）。

How beautiful Sandy looks _____ blue!— I’m sure this blue skirt will look nice ______ you, too. [ ]

We are looking forward _____ a great day.[ ]

It’s wise to forget things which aren’t worth ______.