Ⅰ.单句语法填空
1．By the time he realizes he ，it'll be too late for him to do anything about it. (walk) into a trap
2．My brother is an actor.He (appear) in several films so far.
3．Mr Lee moved to New Jersey in his early twenties and he (live) in the United States ever since.
4．Nowadays，many TV channels are full of sex and ． (violent)
