Exploring ________space is exciting, yet
题型:选择题
问题:
Exploring ________space is exciting, yet dangerous. There is ________need for both robots and
humans for space exploration. [ ]
A. the; a
B. a; a
C. /; a
D. /; the
Exploring ________space is exciting, yet dangerous. There is ________need for both robots and
humans for space exploration. [ ]
A. the; a
B. a; a
C. /; a
D. /; the