There_______ still some milk in the fridge. We don't need to buy any.

A．have

B．is

C．are

D．has

玉米开花遇到连绵阴雨，果实产量降低的原因是

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A．阴雨天，子房不能发育

B．阴雨天，气温低，花粉不能成熟

C．花粉被雨水冲走，影响传粉，影响果实的形成

D．风大，气温低，进行传粉的昆虫采蜜活动减少