31. An e-pal, as you have known, means a friend ______ you write e-mails.

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you have, will rain you will have, will rain you will have, rains will you have , rains

you will have, will rain you will have, rains will you have, rains you have, will rain

should know must know have known will know

will know know have known will have known

joined, would know had joined, would know joined, would have known had joined, would have known

did you know have you known do you know you know

have joined ; will know had joined ; would have known should join ; would know would join ; have known

Had you told You have told You had told Have you told

you have, will rain you will have, will rain you will have, rains you have, rains

will know know have known will have known

should have spoken; would know spoke; would know had spoken; would have known had spoken; would know

you will have, will rain you will have, rains you have, will rain you have, rains

have got to know have known knew got to know

don’t know,have studied didn’t know, had studied didn’t know,studied don’t know, am studying

would have known would know will know will have known

I hope not Yes, I have I hope so Yes, I’m afraid so

If I would have known it If I had have known it Had I know it Should I know it

had she known Did she know If she know if she should know

you have/ will rain you will have/ will rain 　 you will have/ rains will you have/ rains