Chinese President Xi Jinping has praised a group of middle school students for their efforts in satellite design. He said he was pleased with their curiosity and bravery in       1       (science) exploration. The president also wished the teachers and students in Bayi School     2     happy new year.

Xi made the praise in a letter     3       (write) to the students in Beijing’s Bayi School on Saturday. A small satellite designed and developed by them     4       (send) into space last Wednesday at Taiyuan Satellite Launch (发射) Center     5     it was designed to operate in orbit (轨道) for 180 days.

Three months ago, Xi returned to his high school, to visit a laboratory and talk to teachers and students     6     were designing the small satellite. The president said he was     7     (extreme) glad to know that the satellite designed by the students would be launched and called on them to become     8     (build) of the country. Xi warmly encouraged the students     9       (study) science and contribute to the development of China. He hoped that the students would keep hungry for knowledge and develop     10     (they) national spirit.