●The major problem with Email is that it is (71) easy to use that people can become (72)

●The major problem with Email is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day.In addition，mail boxes require some management to (74) messages or archive those that might be required later.Senders don't always know about your Email backlog and often send (75) messages.

(71) A．too

B．so

C．very

D．much

(72) A．full

B．lost

C．inundated

D．filled

(73) A．more than

B．than

C．that

D．which

(74) A．manage

B．save

C．backup

D．dispose of

(75) A．toomany

B．redundant

C．long

D．trivial