Read the text and fill in the gaps with the correct form of verbs as per subject and context:

Man has unquenchable thirst for knowledge. He is never (a)______ (satisfy) with what he already (b)_______ (know) and (c)______ (see). Naturally he (d)______ (want) to know and (e)________ (see) more and more. This curiosity for (f)______ (know) more has (g)_______ (inspire) him (h)_________(undertake) and (i)_______ (carry) out difficult and dangerous tasks which eventually (j)________ (result) in epoch making discoveries and inventions and (k)________ (lead) him in his long and continuous journey from his helpless state of caveman to his present situations of power and progress. He (1)________ (be) helpless still now, he would not have (m)________ (be) able to control all powers and forces. (n)________ (invent) so many technologies he now controls almost all destructive powers and forces.