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We need to take action instead of waiting here for problems________.

       a total of 90 athletes to the games. China shared a seventh place at the medal with Sweden in the Winter Olympics Games in Vancouver.

In April, 2009, President Hu inspected the warships in Qingdao, ______ the 60th anniversary of the founding of the PLA Navy.

On December 28, 2009, a terrible tsunami happened in the coasts of South and Southeast Asia, _______ over 25,0000 people. 

He is  a man who is difficult ____.

Is this the computer you want to _____?

The environmental problem we are looking forward to _____ is __________ our attention.

The students entered the classroom, smiling and _______, and _____ down to have their lessons.

So far, several cases of a disease, ___________as H1N1, are reported to have been found in the country. 

Generally speaking, ______ according to the directions, the drug has no side effect.