1.
Are we writing a test now?
Are we writing a test or a letter now?
We are writing a test now, aren't we?
When are we writing a test?
Who is whiting a test now?
2.
Will he go to London next year?
Will he go to London or to Paris next year?
He will go to London next year, isn't he?
When will he go to London?
Who will go to London next year?