Who does it belong to?我觉得这里的Who应该改成whom,应该是做宾格,那这句话不就错了?什么时候用疑问词的宾格,所有格?

I don't know who the watch____A.belongs B.belongs to C.does it belong to D.does it belong do you know who the clock___?(belong to/does belong to/is it belong /does it belong)belongs to do you know who the stamp__?a:does belong tob:does it belong toc:is it belong tod:belongs to --who does it belong to 的回答--Me.还是Mine. 为什么不能用who does it belong to There is a nice-looking car there.peter wonders___A.it belongs who b.whom does it belong toc.whom it belong to d.who does it belong There is a nice-looking car there.peter wonders___A.it belongs who b.whom does it belong toc.whom it belong to d.who does it belong就是搞不清楚为什么要用whom ,who也可以么, Who does this watch（belong）to? Who does this schoobag?A.belong B,belong to C.Who does this schoobag?A.belong B,belong to C.to belong D.belong of What a nice house!Who ___ it ___ Mr Black .A .is;belonging B .does;belong to C .has;belonged to D.will;belong Tony doesn't study hard He often （let）his father down Who does this watch（belong）to 想知道是who does this book belong to?还是whom does this book belong to? 问下各位高手： There is a nice-looking car there. peter wonders___A.it belongs who b. whom does it belong toc.whom it belong to d. who does it belong请问各位高手选是选C 吧,就是搞不清楚为什么要用whom ,who也可以么, 请问Who does this belong to 这个说法对吗? who do these books belong to?who does these bookwho do these books belong to?who does these books belong to?哪个对? Who does it belong to?我觉得这里的Who应该改成whom,应该是做宾格,那这句话不就错了?什么时候用疑问词的宾格,所有格? 这些钥匙是谁的who does these keys belong to?还是Who do these keys belong to?Whom does these keys belong to 那句对 places where it doesn't belong是什么意思