To avoid the virus(病毒), we should wash hands more carefully ________ we have meals.
so
before
because
although
Kate is really ______. She’s never angry with others.
Professor Nelson wanted to know ______.
Thousands of spectators came to Shanghai to ______ the 48th World Table Tennis Championships.
--- Tom, can you tell me__? --- Sorry, I don’t know.
---What is a left-luggage office? --- It’s a place where bags __be left for a short time, especially at a station.