1. Exceptional children are different in some significant way from others of the same age. For these children ________to their full adult potential, their education must be adapted to those differences.
A. to develop
B. to be developed
C. developing
D. will develop
2. Space exploration promises to open up many new territories for human settlement, as well as _________the harvest of mineral resources.
A. leads to
B. to lead to
C. leading to
D. lead to
3. Someday, solar power collected by satellites ________ the earth or fission power (裂变能)manufactured by mankind may give us all the energy we need for an expanding civilization.
A. circled
B. to circle
C. circling
D.circles
4. In this experiment, they are wakened several times during the night, and asked to report what they ________ .
A.had just been dreaming
B. are just dreaming
C.have just been dreaming
D. had just dreamt
5. Her terror was so great ________ somewhere to escape, she would have run for her life.
A. only if
B. that there had only been
C. that had there only been
D. if there were only
