As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.

The manager told me with great ______ that he couldn’t offer me the job.

 The speaker was very good at describing feelings. The __________ of his words moved every listener.

—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.

Those who suffer from headache will find they get _______from this medicine.