—What are you going to do in the summer vacation?
—I ________ a volunteer in the hospital.
was
am
will be
--- ______ does this scarf belong to? --- Let me see. Oh, it may be ______.
--- ________ people are taking action to protect the environment now. --- Yes. ________ of my classmates come to school by bike now.
--- Look at ______ moon high up in the sky . --- Oh, what ______ bright moon ! Let’s go out to enjoy the night, shall we?
I think history is interesting, you don’t like it.
is the second day of a week.