Question

--- What are the kids doing?
--- They ______ flowers in the garden.

1. A.
   water
2. B.
   watered
3. C.
   have watered
4. D.
   are watering

Answer 1

D
考查情景交际和写作进行时。句意“那些孩子们在做什么？”“他们正在花园里给花浇水呢。”说话时正在进行的动作，用现在进行时，构成是am/is/are+doing。主语是复数，故用are。故选D。