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.