The weather is sometimes rainy in the UK./
Sometimes the weather is rainy in the UK.
句意:英国的天气有时下雨。
句子为陈述句,主语为weather,其需与定冠词连用。其后为be动词is+天气状况。题干中有频率副词,sometimes故其可以放在be动词is之后,或者句首,地点状语放于句为,且UK前需用定冠词。故本题答案为:The weather is sometimes rainy in the UK./
Sometimes the weather is rainy in the UK.