A.It allows for failures.
B.It is entertaining.
C.It charges no tuition.
D.It meets practical needs.
A.Train students to think about global issues.
B.Design more interactive classroom activities.
C.Make full use of informal learning resources.
D.Include collaborative inquiry in the curriculum.Passage Two
A.It may lead to the bankruptcy of Virgin Galactic.
B.It has a strong negative impact on space tourism.
C.It may discourage rich people from space travel.
D.It has aroused public attention to safety issues.
A.It has just built a craft for commercial flights.
B.It has sent half a dozen passengers into space.
C.It was about ready to start regular business.
D.It is the first to launch "suborbital" flights.