Questões Militares de Inglês - Pronomes interrogativos | Question words

Which question word best completes the paragraph below?

So if smoking is so bad for you, ______ is it so hard to quit? Stopping smoking is difficult for several reasons: nicotine is highly addictive, rewarding psychological aspects of smoking and genetic predisposition.

(Adapted from http://www.spine-health,com/wellness/stop-smoking)

Mark the sentence below that CANNOT answer the following question correctly.

“ Which prejudice do you have?” (line 56).

Mark the correct question for the sentence “prejudice based on religious affiliation” (lines 40 and 41).

Read the dialogue and mark the right expression to complete it correctly.

A: _____________ have you been working as a sergeant?

B: For about 2 years.

Which question word best completes the paragraph below?
The National Gallery in London is among a growing number of venues that have banned selfie sticks. ________ is so wrong with walking around a gallery taking pictures of yourself ? The gallery says it needs to protect artworks and other visitors. But some users can’t see what the fuss is about.
(Adapted from http://www.bbc.com).