I am a gorilla and I thump my ____.

The newcomers directly ______ the livelihood of the established workers. A: threaten B: thrive C: thrust D: thump

It was either the eruption of the people in the stands or the thump of his landing that brought Michael back to earth. 这句话的真实主语是：

The following is how Michael Stone looks back on that day's competition. __________, (1) I can see every detail of that pole vault. The bar was set at a new height. As I heard the crowd __________ (2), I knew my __________ (3) had failed to clear it. It was time for my final jump. However, the __________ (4) of the moment filled my mind with __________ (5). I was __________ (6) and my palm began to __________ (7). I tried to shake off the __________ (8), but was unsuccessful. At the critical moment, I remembered my mother's advice to breathe deeply and brought myself under control. Then I was off, up and away, __________ (9) like an eagle, just as I did in my __________ (10) dreams. The thump of my landing __________ (11). I had done it! This was no mere __________ (12), but the real thing. All the __________ (13) and hard work had paid off. Friends were rushing to __________ (14) me and I was surrounded by __________ (15) clicking cameras of the __________ (16).