Computers are becoming faster, (A) so too are modems, they are the devices to (B) so too are modems, the devices that (C) so too modems, the devices allowing (D) also modems, they are the devices that (E) also modems, which are the devices to 答案选B我知道,我想问一下C错在哪? OG的解释是这里一定需要are,为何呢?
more powerful, and more reliable, and so too are modems, they are the devices
to allowtwo or more computers to share information over regular telephone
lines.
allow
allow
allow
allow
前一个be是助动词,后面的be是系表结构, 所以不能省略
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