you't better help those _____are in thouble .请问选下列哪一个答案：A:who B:that C:whose D:whoch

A

A:who
_____are in thouble 是定语从句修饰those,指those people,从句中缺少主语,指人,所以用who.

those who 是固定的说法

A
这是定语从句，这里缺少连接词，而前面是those，后面就不能用that了。