today computers are small and cheaper.---they can do a lot of work,many people like to use them.Today computers are smaller and cheaper.---they can do a lot of work,many people like to use them.A.andB.since

问题描述:

today computers are small and cheaper.---they can do a lot of work,many people like to use them.
Today computers are smaller and cheaper.---they can do a lot of work,many people like to use them.
A.and
B.since

A