It was a pity that the great scientist died      his research unfinished. 

So desperate ______ that no one could help another, each ____ to save himself and his animals.

In New Zealand , people live in the houses with their doors _______ north.

 On Sundays there were a lot of children playing in the park, _______ parents sitting together joking.

A devastating(毁灭性的) mudslide in northwest China's Gansu Province earlier in August killed at least 1,467 , with 298 still ___ .