一、单元扣点
Ⅰ.根据句意，用所给单词或短语的适当形式填空
at a time take an active part in keep an eye onset up as a result introduce include be concerned about sth. in danger be home to
1．All flights have had to be cancelled ________ of the pilots' strike.
2．Mary offered to ________ the baby while I went out.
3．The army has ________ road blocks round the city.
4．Our tour party ________ several retired couples.
5．How can you expect me not to ________ my own son?
6．We had to see the nurse one ________.
7．A large sum of fund has been ________ the company.
8．At college I ________ student politics.
9．Joseph is doing what he can to save animals ________.
