Alice is so careful that she always goes over her test papers to ____ there are no mistakes.[ ]

A. look for

B. make sure

C. find out

D. think about

饮料生产过程中只有一次灭菌，饮用时人们不再加热处理，因此生产饮料要采取严格的卫生管理措施。饮用的瓶装饮料开盖后，存放时间一般不要超过4 h。