He wants to know_his mother liked the bike. A that B which C what D whether

问题描述:

He wants to know_his mother liked the bike. A that B which C what D whether
请给出答案后说明理由,并解释D的意思

选择D
whether是是否的意思
他想知道他的妈妈是否喜欢这辆自行车.
只有这个意思是通顺的那C为什么不行?还是从句子上来看what his mother liked the bike是没有意义的一句话。