题目内容：

 

1.The children's mother showed great c___________for their safety when they didn't come back from school at the usual time.

2.The old man felt __________ (感激的) to the young man for his helping.

3.It didn't take a long time for him to r_________ from the illness.

4.He did it on ___________ (故意), knowing it would annoy her.

5.I think it is wrong of you to __________ (忽视) the teacher's advice.

6.Nearly one hundred countries recognize English as their o__________ language.

7.Please set off earlier because the buses run less_________(频繁) on Sundays.

8.Her worried e ________ on her face suggested that she was very frightened.

9.She speaks very ______（流利的）English.

10.We can enrich our v________ by reading English books.