When I got to Linda’s home yesterday, she _______ her mother with the housework.

Tom likes English ,___________

Do you know the people _______ came to the party yesterday?— No, I know none of them.

Mum, I can’t find my new pen.—Don’t worry. It ____________in one of your pockets.

The World Health Organization has given some advice onto protect us from being infected(感染） with H7N9.