Every weekend my younger brother will go to help the old man far away my house,for which he often received some            from the old man,such as a pencil and some sugar.

Companies are struggling to find the right _____between supply and demand, but it is no easy work . 

—Do I need to give a tip if I eat at a fast food restaurant in the United States?—Yes , it’s a common       to tip waiters in a restaurant.

Why was he turned down from the office when he had all the appropriate _______for the job?

The current political _____ of our country is favorable for foreign investments.