现在进行时be+v.-ing — 英语情景题

Read and complete the dialogue. 补全对话（每空一词）。 Mum: Tom, dinner is ready. Where is Sam? Tom: He (1)________ in his bedroom. Mum: What (2)________ he (3)________ there? Tom: Look! He (4)________ (5)________ a model plane. He usually (6)________ model planes after school, but today he is making one now. Mum: OK. Please tell him to come and eat. Tom: All right.