Question

【题目】We should study the new traffic rules and learn how ____ ourselves.
A.to protect
B.protect
C.protects
D.protecting

Answer 1

【答案】A
【解析】句意：我们应该学习新的交通规则，学会如何保护自己。“疑问词＋动词不定式”在句中作宾语。所以答案是A。