The ______ look on the manager’s face suggested that he _______ to overcome the difficulty.

It is reported that 70% of people in China are ________ about the food security situation after  so many accidents.

At the end of the year 2010, some species of birds ddn’t survive the _____ winter in some European countries.

Finding the ______look on the student’ s face, the professor felt _____about his explanation. 

We Chinese can work wonders, that is, we can make ____.