The fact that so many people still smoke in public places ________ that we may need a nationwide campaign to raise awareness of the risks of smoking.(2011·江苏)

Tony has much difficulty ______Chinese , so he often asks me for help . 

—I called you at 5:00 yesterday afternoon, but no one answered.—Sorry, I with my parents ________ at that time.

The Japanese          suffering from the worst natural disasters         .   

— Mike, what did our monitor say just now?—Every student as well as teachers who are to visit the museum _____ asked to be  at the school gate before 6:30 in the morning.