It is difficult to determine ____ when humans first began cultivating wheat, since very few written records su…

Question

It is difficult to determine ---- when humans first began cultivating wheat, since very few written records survive from that period.

Accepted Answer

exactly — 'Since very few written records survive' gerekçesi, tam/kesin bir tarihin belirlenmesinin zor olduğunu açıkladığından 'exactly' (tam olarak) doğrudur. 'Eventually' ve 'partially' bir kesinlik derecesi belirtmez; 'importantly' cümledeki 'zorluk' vurgusuyla ilgisizdir.