Volunteering is becoming _____popular in China— Yeah, people are now aware that helping others is helping themselves [ ]

At the conference , political leaders from many countries promised to work together to defend the world ________ terrorism and other threats.

_______ I know the money is safe, I shall not worry about it.

I will go to the countryside to see my grandmother tomorrow, so I can’t go swimming with you.-______.

Be careful. You might fall into the river.—Thank you. I ________ I ________ so close to it．