A low-carbon(低碳) lifestyle has an effect our daily life. People are paying more and more attention to energies these days.
In some Western countries shops are closed ________ weekends.
Our teacher always helps us ________ our English.
The desk is not dirty.You ________ clean it.
He is very good ________ the children.
Miss Read is good ________ music.She can be good ________ children in the music club.