Question

3.1 don't think _is useful for little children to watch

this kind of film.

A. one B.that C.this D.it

Answer 1

D think后是一个省略了 that的宾语从句，从句是句型"It is

+arfj.+for sb. to  do...",it作形式主语，真正的主语是后面的不

定式短语。