This returned Chinese scholar has become one of the top experts in this field.—Yes , I know him very wellHe ___________ in Africa with wild animals for eight years

Do you have any more bags of this size — I’ sorry we’ve sold ________ but this one.

Mary didn’t attend the lecture, did she? — Yes, she ________.

Finally, my thanks go to my tutor, who has offered a lot of suggestions and comments on my paper and ________ every page of my draft.

He is a key ____________ in the murder so we must protect him from all kinds of danger