How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates？（）

He should know how ______ the Internet. But if he doesn't, you'd better tell him.(use)

A．how should we do

B．what we should do

C．what should we do

A.canˊt drive

B.mustnˊt drive

C.shouldnˊt have driven

D.should not drive

She hasn‘t decided with ______ she should first make contact.

A. who

B. whom

C. how

D. which

A.Far from. I should have stayed home sleeping.

B.It lasted until midnight.

C.my seat was far from the stage.

D.Sorry. I don’t agree with you.

-I'm thinking of going away for the weekend.

_____go to Beidaihe？ You can swim in the sea there.

A. How about

B. Why don't you

C. You should

A、Far from. I should have stayed home sleeping.

B、It lasted until midnight.

C、my seat was far from the stage.

D、Sorry. I don’t agree with you.

A.Far from. I should have stayed home sleeping.

B.It lasted until midnight.

C.my seat was far ｆrom the stage.

D.Sorry. I don’t agree with you.

A．It tells you that you have failed and your hypothesis is useless．

B．During the experiment stage the supposition should be constantly modified and reviseD

C．It means that the experiment has brought some new facts to light that maybe you hadn’t thought about befor

E．

A.It’s unreasonable for any websites to ask for a fe

B.We shouldn’t give these websites any fe

C.We can pay the fee to these websites under some circumstances.

D.We just needn’t visit these websites any mor