B)根据句子意思，用括号中所给的单词适当形式填空。
____  ▲  (wolf) belong to the dog family, living and hunting together.
____ With the money donated, we have   ▲ (success) helped many poor young girls return to school.
____ If we always keep our worries to   ▲  (we), things will get even worse.
____ Our head teacher warned us   ▲ (not fly) kites near power lines in spring.
____ Though it seemed   ▲  (hope) to pass the exam, he still kept on trying.
____ A recent scientific report says three   ▲  (eight) of the school students suffer from sub-health(亚健康).

甲数的 $\frac{2}{3}$ 等于乙数的 $\frac{3}{4}$ ，甲数是乙数的百分之几？正确的解答是（   ）

人体的结构层次与植物的结构层次相比，最重要的区别是（　　）

790多年前，成吉思汗带领蒙古大军挥舞弯刀驰骋征战，如今他的后代用马头琴向世界传递和平之声。为纪念世界反法西斯战争胜利70周年，内蒙古野马乐团准备了《初升的太阳》等曲目，寓意“和平就是我们的太阳”。这反映了(　　)