---Has your Chinese teacher been to the USA?--- Yes. She has been there twice.
I don’t remember when and where I _________ this umbrella.
—What did Jane say? —She said she _________ at school that day.
—Hurry up, _________ we’ll be late for the coming show. —Okay.
—Hello, Peter. How are you doing ? —_________ .
Excuse me . Could you tell me _________ ?