中国大学MOOC: The birds are singing ____________ the tree.
举一反三
- 中国大学MOOC: 判断正误The birds singing in the tree. The butterflies dancing in the flowers.
- ______ are the birds doing? They are singing in a tree.
- The birds are singing ____________ the tree. A: on B: in C: of D: with
- 中国大学MOOC: —Is this ____________ (an / the ) apple tree? —No, it is ____________(an / the ) orange tree.
- ______ are the birds doing?—They are singing in the tree. A: Who B: What C: How D: Where