If the weather had been better, we could have had a picnic. But it_____all day.
A．rained B．rains C．has rained D．is raining
If the weather had been better, we could have had a picnic. But it_____all day.
A．rained B．rains C．has rained D．is raining
A
A If the weather had been better, we could have had a picnic.此句是对过去事情的假设，但事实上下了一天雨，根据句意，最后一句应用一般过去时，表示对过去事实的陈述。