题目

已知 ，则（） A . x＜z＜y B . x＜y＜z C . z＜y＜x D . x=y＜z 答案：BThe farmer didn’t know ________ . A．where he can plant the young apple tree B．where can he plant the young apple tree C．where could he plant the young apple tree D．where he could plant the young apple tree