单项选择题

All of the following are the steps of canning food except ______.

A．cleaning and trimming raw food
B．sterilizing canned food
C．blanching vegetables that are to be canned
D．printing labels and packing the tins into boxes
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单项选择题
According to the passage, after the average per-minute cost dropped to 11 cents this year from 56 cents in 1995, the phone companies ______.
A．attracted more and more new users and as a result, they began to flourish
B．began to suffer from a great loss
C．made traditional phones more popular
D．invested much more money in creating new phones
单项选择题
According to the passage, the complaints of American customers about the cell phone are showed in the following statements EXCEPT ______.
A．they can not listen to the voice clearly
B．the phone is cut off while they are communicating
C．the prices for wireless service are high
D．the cell phone is never connected in some places
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