It's rainy these days .There (be) much water in the river

问题描述:

It's rainy these days .There (be) much water in the river

must be

It's rainy these days .There (is) much water in the river.

must be:must be +形容词/名词/介词短语等,表示对现在的状态或所在的方位等的推测,是有把我的推测.这句话前面有It's rainy these days (这些天一直在下雨)所以很有把握地猜测河里肯定会有很多水.