The plant is dead. I it more water.A. will giveB. would have givenC. must giveD. should

问题补充：

The plant is dead. I it more water.

A. will give

B. would have given

C. must give

D. should have give

答案：

A. will give

B. would have given

C. must give

(答案→)D. should have give

解析：

should have done表示“过去应该做而没有做某事”。