看图，补全对话。
1．
—What
_________ _________ doing?
—We are
_________ _________.
2．
—What is he doing?
—He is doing the
_________ _________.
3．
—Are you playing volleyball?
—
________, we
__________.
4．
—What are they doing?
—They are
________ the
_________.
5．
—Are they playing badminton?
—
_________, they
_________.
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