题干
–The banana is too big. Do I need ____?
A：cut it up
B：to cut it up
C：to cut up it
答案(点此获取答案解析）
B
–The banana is too big. Do I need ____?
A：cut it up
B：to cut it up
C：to cut up it
PCl3(g)＋Cl2(g) ②2HI(g)