The disease failed to _______ to the new drugs the doctor used.
The big fire ________ due to the burning of construction materials caused 58 deaths and destroyed all the belongings of the people there.
-----What’s one of the major problems _____ the children living in remote mountainous areas?----- It’s poverty.
Doctors Without Boarders, ________ international organization, received ________ Nobel Prize for Peace in 1999 for its outstanding work .
It was several minutes ________ we realized what was happening—our dog was trapped in a newly-dug tunnel.
Luckily, I ________ before the deal turned bad, which saved me much money.