Some people are walking _______ the bridge and some boats are going _______ the bridge.
The piece of music sounds__________. Let’s enjoy it.
The subjects students study in America are different from________in China.
great fun it is hide-and-seek in the park!
It’s _________unlucky day today because I lost_______useful book.
- Don’t forget your homework next time, will you? - ______________. Please believe me.