(用关系代词 who，which 或 that 将句子连成一个定语从句) I won't buy bananas．They aren't ripe．

(用关系代词 who，that 或 which 填空) I like the present _______ you've sent to me.

(用关系代词 who，that 或 which 填空) A panda is a kind of animal ______ can be found only in China．

(用关系代词 who，that 或 which 填空) She was not on the train _______ arrived just now.

(用关系代词 who，that 或 which 填空) My brother, _______ is in Grade Three，studies very hard.