Question

The teacher seldom let an opportunity to teach his students or to help them make up for the days of schooling they had missed ________．

1. A.
   pass
2. B.
   passing
3. C.
   to pass
4. D.
   being passed

Answer 1

A
考查非謂語動詞作賓補。本題的難點在于句子結(jié)構(gòu)復(fù)雜。本題中的an opportunity to teach his students or help them makeup for the days of schooling they had missed作let的賓語，其中to teach his students or help them make up for the days of schooling they had missed作opportunity的后置定語，同時they had missed作the days of schooling的定語。由此可知pass是賓語補足語，在let后的賓補用動詞原形。