WH- questions

The other day some of you asked me about how you can learn the WH- questions.
Here you have some clues that will facilitate it.
I hope you enjoy it.

Here you have a chart with some examples:

Let's try to do these tests which will be so useful for you:

TEST 1:   http://www.learnenglish-online.com/grammar/tests/whquestions.html

TEST 2: http://www.learnenglish-online.com/grammar/tests/whquestions2.html

TEST 3: http://www.learnenglish-online.com/grammar/tests/whquestions3.html

ACTIVITY 4: http://www.englishexercises.org/makeagame/viewgame.asp?id=1718

What do you think about them? Are they easy or difficult?