问题详情:
Scientists are trying to develop a special material, _______ they will make use of in space.
A. it B. that C. what D. one
【回答】
D
知识点:代词
题型:选择题
问题详情:
Scientists are trying to develop a special material, _______ they will make use of in space.
A. it B. that C. what D. one
【回答】
D
知识点:代词
题型:选择题