Ⅰ.单句语法填空
1．There was a big crowd and we had difficulty getting(get) a taxi.
2．A large contingent from Japan was present at the conference.
3．The book referred(refer) to by Mr.Wu is written by my English teacher.
4．There is no sense in worrying(worry) about the past.
5．I have some letters to be typed(type)．Can you help me?
