It is ___ the customers’ needs that hasmade chain stores so popular in big cities in China.

In class , our teachers always stand______ us in order to hear us clearly.

We usually play ______soccer for half_____hour on _____playground.

In Chinese classes, if you know the answer to the teacher’s question, usually, you will _______ your hand and ________ to speak.

We have T-shirt____green,blue and red.