The students should to choose their own clothes. It will be a good way themselves happy.
A. allow, to keep
B. allowed, keeping
C. be allow, keeping
D. be allowed, to keep
网友回答
A. allow, to keep
B. allowed, keeping
C. be allow, keeping
(答案→)D. be allowed, to keep
解析：情态动词should的被动语态应该为should be +动词的过去分词，即should be allowed to do sth，a good way to do sth,动词不定式作后置定语，故选答案为D