单选题 Researchers are ______ how AI systems can generate intelligible and useful responses to human beings through the use of natural language.

单选题 Recent events have helped to build up a common ______ between the two companies.

单选题 A dozen freshmen were treated for ______ injuries but no death was reported as a result of this accident.

单选题 The Human Resource manager will review the applications to ______ out the unqualified candidates.

单选题 The 15-year-old boy was fascinated by the starry sky, so he decided to study astronomy in ______.

单选题 Since my parents moved to Shanghai, I have been living ______ my own for three years.

单选题 The lady promptly burst into ______ when she got the sad news.

单选题 The passionate volunteer continues her daily ______ of visits to the refugee camp, to children in need, and taking care of the sick there.