cau 1 : make questions for the underlined parts
1 vietnam exports rice and seafood to foreign countries
=>What does Vn export to foreign countries ?
2 she goes to the post office twice a month
=>How often does she go to the post office.
3 many people jog to be healthy
=>Why do many people jog?
4 we should buy some canned food before a typhoon
=>What should we buy before a typhoon?