问题
选择题
The birth planning policy allows my parents to have a second child because of my disability, but to look after me, they chose ________.
A．not to do
B．not to have
C．not to
D．to not have one
答案
答案：C
C 考察不定式的省略结构。通常不定式中的to要保留，其后的不定式短语可以省略，或者使用不定式do so来替换。故C正确。