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一What’s this?
一It’s an_______.
A.ruler B.map C.book D.orange
---What’s this ?
---It’s ______ orange.
A. a B. an C. the
–What’s this? –It’s________ orange.
A. / B. a C. an D. the
-What’s this ? -It’s ______.
-What color is it? -It’s ______.
A. orange, an orange B. an orange, an orange
C. orange, orange D. an orange, orange