This is orange. That ruler is orange.A. an, / B. an, an C. a, an
—Could you pass me _____glass on the table please?—Sure, but it’s _____empty one.
— How do you study for a test? — I study _____working with a group.
—Would you like to drink some juice? --Thanks. But________. I have drunk a lot of tea.
—Where is your mother, Rita? --___________________.
—Li Na is the first Asian who won championship in French Tennis Open. --Yes, we ___________ her.