Question

----If a new difficulty ______, what would we do ?
-----Don’t hesitate to turn to us .

A．is arisen

B．will be arisen

C．arose

D．would arise

Answer 1

C

试题分析：句意：如果新的困难出现了，我们该怎么办？--不要迟疑向我们求助。从what would we do ?可知这是和将来相反的虚拟语气的主句，从句应该用过去时或should do，were to do，所以选C。