Why has adviser found the second chapter of my dissertation too long?
What have the workers of this factory decided to produce?
What has the examiner found ?
Why haven't they answered my request?
Why has our group determined to agree to plan?
How have the scientists changed the order of the whole process?
In what way has he reduced the fraction?
Why have we come to the conclusion that these features are not essential?
What exactly has already happened?
Why haven't postgraduates taken part in our research?
What kind of journals has our English teacher brought today?
Why haven't I I divided the given quantity into two parts?
Why hasn't my sister translated texts from Russian into English?
What have they have agreed to accept ?
Why have they have chosen the most conventional method for their experiment?
Who have already learned something about rational numbers?
What kind of solution has he found ?
Where we travelled last year?
When we travelled to Spain?
Who travelled to Spain last year?