he asked me whether these islands--to China

问题描述:

he asked me whether these islands--to China
A,belonged B belong C,are belonged D,have belonged答案是B,

当属于事实,公理,大家都知道的情况时,从句不改变时态
所以这里要用原形.
再给你举个例子
he said the sun is round.后面用is而不是was