We should study the new traffic rules and 1earn how ourselvesA. protectB. to protectC. pr

发布时间：2020-08-23 00:10:27

We should study the new traffic rules and 1earn how     ourselves．
A. protect
B. to protect
C. protecting
D. protected

网友回答

A. protect
(答案→)B. to protect
C. protecting
D. protected
解析：句意：我们应该学习新交通规则，学习如何保护我们自己。how to do sth 如何做某事，不定式表方式，故选B.
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