----- How did you know the surprising news?
----- I happened _______ the event then.
A．to cover B．to be covering C．covering D．to have covered
If the wound ______ become infected, do not hesitate to call me.
A．shall B．must C．should D．would
With two sons ______ in Afghanistan, John and Susie Mayes are working extra hard this year to make sure their grandchildren have a great Christmas.
A．to serve B．serving C．having served D．served
In front of the city hall stands a statue of a monkey, _____ is said to bring good fortune to those who pat his head.
A．that B．it C．which D．one
Be quick, _____ we’ll miss the beginning of the fireworks display in the park.
A．so B．or C．because D．though
Once _____ in a theater wearing 3D glasses, you feel as though you are caught up in the story which is showing around you.
A．seated B．be seated C．to sit D．have been sitting
