超全的英语专业四级的语法题.doc

英语专业四级语法练习题
1. 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
2. Someday, solar power collected by satellites the earth may give us all the energy we need for an expanding civilization.
A. circled B. to circle C. circling D. circles
3. 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