The children can't use chopsticks __________(正确地).
A__________ (平衡的）diet is very important for ourhealth.
__________(营养）and exercise are essential to fitness and health.
Athens __________(起作用）as a centre of trade inthe thirteenth century.
Let's open the windows and have some __________ (新鲜的)air in here.
You may go with them, but they can't __________ (保证）your safety.
Childrenalways wish to be __________ (成年人）assoon as possible.
They have to reach a certain __________ (标准）orthey won't pass.
They're always given __________ (额外的）workto do.
The girls usually have the habit of eating __________ (零食）.