Could you please point out which the correct sentence is and explain why?
a) "That movie is too interesting for me to watch ( X ) only once"
b) "That movie is too interesting for me to watch IT only once"
A) Big Brothe iss too foolish for me to watch (IT?).
A) Those clothes are too dirty for me to wear to go out.
b) They are too old for me to wear THEM to go out.
I would say that 1-a, 2 (without it), and 3-a would be the most natural. The other forms are grammatical, in that they include an object for the infinitive, but they wouldn't be common. I like 2 (with the it) the least. Without a modifier at the end, that "it" just hangs there. :wink: