The value of life lies not in the length of days but in the use we ____ them.

inese government will keep updating informationabout H7N9 bird flu in a transparent manner, and _______ public concerns in a timely manner.

There’s no doubt ________ international cooperation is the key to ______ with cybercrime.(网络犯罪)

es are a natural part of learning, and it isimportant not to let them our life.

My mother won’t let me ________ the cell phone when I do my homework.