____ development of nuclear weapon is __
题型：选择题
问题：
____ development of nuclear weapon is ____ threat to ___ mankind. [ ]
A. The; /;the
B. The; a; /
C. A; /; the
D. A; a; /
____ development of nuclear weapon is ____ threat to ___ mankind. [ ]
A. The; /;the
B. The; a; /
C. A; /; the
D. A; a; /