阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    Ten Chinese engineers were driving down a road to a National Forest Park. They were ____ (sudden) amazed by what they saw. Three tall animals, ____ (cover) with long black hair, were crossing the road. On ____ (see) the animals, the engineers immediately stopped and ran after them. However, when they saw ____ move through the forest with great speed and strength, they did not dare to follow any ____ (far).

    The men did not take any photographs but scientists were delighted by the____ (discover), because the engineers are all well educated people and scientists feel they can rely ____what they described.

    Scientists returned to the forest, collected some hair and measured footprints, ____ are about 20 inches. They appear to be the animals' feet! Chinese scientists have now set up a special group to exchange information and made a study of the forest, ____ in the meantime, some people refuse to believe that this half-man, half-monkey ____ (exist). They will not believe it until one of the animals has been caught.