We live in “computer age(时代)”. People like using computers to do ___21__work. But more than 20 years ago, ___22__couldn’t do much. They were very big and expensive. Very __23___people were interested in them and knew how to use them. Today computers are smaller and ___24___.Since they are useful, many people like to use them, even at home.
Computers ___25___very important because they can work ___26___than men and make fewer mistakes. Computers can ____27___people do a lot of work. Writers can use computers to write. Teachers can use computers to help teaching and students use them to study. Computers can also remember what you put ___28____ them. Computers are very___29___. They are our good friends. Do you want to ___30____a computer.

A．all kinds of B．many C．very much D．a lot

A．teachers B．students C．computers D．scientists

A．a few B．few C．little D．a little

A．cheaper B．cheap C．expensive D．more expensive

A．is becoming B．becomes C．become D．became

A．quickly B．quick C．fast D． faster

A．help B．tell C．ask D．stop

A．on B．into C．up D．to

A．heavy B．careful C．beautiful D．helpful

A．lend B．pay C．have D． sell