The price of beer __________ from 50 cents to $ 4 per liter during the summer season. [ ]

May I smoke here? —If you _____, choose a seat in the smoking section.

Modern science and technology has ______ communicationbetween people far apart.

The iphone 4s, ________ by Apple, sells well across the world.

They decided to leave the waiter a big _____because the food and service had been excellent.