We are happy_______ you to the party for our friends from Beijing.

I’d like to go _________on vacation.

Let’s look at pictures _____ Beijing Opera.[ ]

Tony, can you come and help me now?—Sorry, I _________ my favorite show, I’m a singer.

The man in a black suit _______ be our youth worker. — I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.