问题补充：
The boy wanted to ride his bicycle in the street, but his mother told him.
A. not to do
B. not to
C. not do it
D. do not to
答案：
A. not to do
(答案→)B. not to
C. not do it
D. do not to
解析：考查不定式的省略。在不定式省略的时候，通常只保留不定式的符合to，而把后面的其它成分都省略掉。但是当不定式符号后面有be或者have的时候，be与have要保留。句意：那个男孩想在街上骑自行车，但是他的妈妈告诉他不要这样做，故B正确，
