—You look upset.What's the matter?—I had my proposal ________ again.(2011·江苏)

—How often does your sister surf the internet?—About            .

 Some parents are just too protective. They want to _______ their kids from every kind of danger, real or imagined.

Walking alone in the dark，the boy whistled to ________ his courage.

After the earthquake, the local government took immediate measures to provide _____ for those who had lost their homes.