问题
选择题
When you go outing with your sisters, you must see to ________ that they are safe.
A．everything
B．it
C．them
D．yourself
答案
答案：B
题目分析：固定词组。固定词组see to it that…务必…；句意：当你和你妹妹们外出的时候，你务必要确定她们的安全。故B正确。
点评：固定词组see to it that…务必…；