Ⅰ.单句语法填空
1．If I've caused any offence over something I have written，I will happily apologize(apology)．
2．For amusement(amuse)，we go to the movies once a week.
3．He was cautious(caution)about his work.
4．The boy was sitting at the desk，pretending to be working(work)hard when his teacher entered the classroom.
5．Scientific theories must be based(base)on facts.
6．If anyone is to blame(blame)，it's me.
7．She admitted forgetting(forget) to turn off the light last night.
8．He made a number of rude remarks(remark) about the food.
9．When they go for a walk，Johnny has to take long steps to keep pace with his father.
