（ ）1. English is _______ useful language in the world.
A. a B. an C. the D. /
（ ）2. —What color is _______ orange?
—It’s _________ orange.
A. a, an B. a, a C. an, an D. an, /
（ ）3. The ______ in Beijing is very dry in autumn.
A. season B. weather C. holiday D. history
