Question

For the whole period of two months, there ______ no rain in this area. Now the crops are dead

A. is
B. was
C. has been
D. have been

Answer 1

根据Now the crops are dead说明此句强调的是影响，所以用完成时，
又因主语是rain，为不可数名词，因此助动词要用has。故选C。

Answer 2

C for加一段时间的句子要用完成时，然后在there be 句形中no rain是主语，要保持主谓一致，固选C