Everyone knows _____ is dangerous to pla
题型：选择题
问题：
Everyone knows _____ is dangerous to play with fire, but _____ is difficult is to prevent children from
playing with fire. [ ]
A. that; it
B. it; it
C. that; what
D. it; what
Everyone knows _____ is dangerous to play with fire, but _____ is difficult is to prevent children from
playing with fire. [ ]
A. that; it
B. it; it
C. that; what
D. it; what