Isthewhaletheworld的精选

问题详情：根据短文内容从A、B、C、D四个选项中选出一个能填入相应空格内的最佳*。Isthewhaletheworld’slargestfish?No.Itlookslikeafish,butitisreallyamammal(哺乳动物).Thenwhat’stheworld’slargestfish?It’sth...