Her son _____ the army for two months. She misses him very much.
The bus driver always says to us ,“Don’t get off________ the bus stops.”
----Did you call Sara back ?----I didn’t need to ,_____ we’ll have a meeting together tonight.
—You look so tired. What’s the matter? —I was so busy that I didn’t go to bed 12 o’clock last night.
—Susan, what are the advantages of MP5 players?—Mom, they are smaller and lighter ______ they can be carried very easily.
She is always listening to music ____doing her homework.