是两道关于if从句的英语问题,请解释说明一下为什么.
是两道关于if从句的英语问题,请解释说明一下为什么.
⒈if____,he promises that he will spare no effort in promoting public welfare.
A elected B elect C electing D being elected
⒉If law and order_____not preserved,people will not be able to live a secure life.
A are B were C is D was