Hiro walked up to the microphone. He looked out at the huge crowd and felt a heaviness in the pit of his stomach. They were all__（1）___ at him, waiting.
“Uh, hi，” Hiro said into the microphone. For a moment, his mind went _（2）_. Then he saw Tadashi’s face in the audience. He was smiling and giving Hiro a thumbs-up.
Hiro smiled back and took a __（3）_ . “Sorry. My name is Hiro Hamada, and I’ve been working on something I think is pretty cool. I hope you like it.”
Hiro put on a headset and reached into his hoodie(连帽衫). He __（4）_ a small object no bigger than a paper clip. “This is a microbot.” The small object in his hand took a bow. “It doesn’t look like much but when it links up with the rest of its fellows, things get a little more interesting.”
The crowd didn’t seem __（5）_ . Then a murmur rose as the audience noticed waves of tiny mircrobots twisting across the floor. The single microbot flew from Hiro’s __（6）_ and joined a towering column of microbots that had now formed onstage.
Hiro smiled and tapped his headset. “The microbots are __（7）___ with this neural transmitter(神经传导器).” He took the headset off and the microbots collapsed to the floor. They reformed into a column as soon as Hiro put the headset back on.
“I think of what I want them to do,” Hiro said, “and they do it!” The microbots took the __（8）_ of a hand waving. Everyone in the audience smiled and waved back. “The __（9）_ of this tech are limitless. Take construction.”
Hiro stared at the microbots, and with a wave of his hand, they picked up cinder(煤渣）blocks and assembled them into a tower. “ _（10）_ used to take teams of people working by hand for months or years can now be __（11）_ by one person!”
“And that’s just the __（12）__”Hiro said as he jumped off the tower. Everyone gasped, thinking he was about to _（13）_ , but the microbots rose and __（14）_ him midair. Hiro smiled. He could see Tadashi giving him another __（15）_ .
“How about __（16）_ ?”Hiro asked. The microbots transformed into a set of legs that __（17）_Hiro through the audience. “Microbots can move anything, anywhere, __（18）_ . ”
As they approached the stage, the microbots formed a set of （19）_ so Hiro could climb backup to it. “If you can think it, the microbots can do it!” Hiro said.
The audience was with him now. The moment belonged to Hiro, and he was on a roll. “The only limit is your （20）_! Microbots!” he exclaimed, and the audience burst into applause.