people in the world are suffering from the H1N1 flu.

Congratulations! Among the best pictures in the competition, I found _________. When did you draw it?—During the trip to the Yellow Mountain _________ May.

A great explosion _______ in a chemical factory in Hangzhou several months ago.

A new supermarket ______ in my hometown last month.

Grades are really important, but they’re not ______ to us students.