12.【2019 •江苏宿迁】 Mary is _____ a picnic tomorrow.
A. go to have      B. going to have    C. go to has      D. going to has
【答案】B
【解析】句意：明天玛丽将去野餐。根据时间状语tomorrow可知此处用一般将来时，be going to do sth将要做某事，故选B。
13.【2019 •福建福州】—Can I see the headmaster now?
  —I’m afraid you can’t. He _____ a meeting. He _____ back in 10 minutes. You can wait for him in the lobby.
A. will have; will come        B. will have; comes
C. is having; will come        D. is having; comes
【答案】C  
【解析】句意：——我现在能见校长吗？——恐怕不能。他正在开会。他10分钟后将回来。你可以在大厅里等他。根据Can I see the headmaster now?可知此处表示现在正在，故第一空用现在进行时be doing。第二空根据时间状语in 10 minutes可知此处用一般将来时，故选C。