Question

____ abroad for two years, the two astronauts went back home last year. A．Educating B．Educa.

____ abroad for two years, the two astronauts went back home last year. A．Educating B．Educated C．Having been educated D．being educated

Answer 1

C

考查非谓语动词。句中逻辑主语the two astronauts与educate为被动关系，根据for two years，可知用完成时，选C。