John and Mary’s room _______ on fire. Many _______ help them put out the fire.

Though we found _____difficult to avoid economic and financial crisis, we must take measures to reduce its negative impact.

It was decades ago ________ I was in my teens ________ the Chinese government decided to reform the social economic system.

It’s generally considered unwise to give a child     he or she wants.

. People always hate betting on football. __________ to our joy, our legal authority took action at length.