Computers andNetworks handle delivering the mail,so thatCommnucicating mail users doNot have toBe（）a

[单选]

Computers andNetworks handle delivering the mail,so thatCommnucicating mail users doNot have toBe（）at theSame time or place.

• A、present

• B、parent

• C、doingSomething

• D、doSomething 

2022-04-12 01:09 已解决