2 . [Three Principles of Running]

There will be times when you want to give up. But _________ that it will get easier with time.(根据课文内容填空)

4 . 气候科学家警告说，如果我们不采取适当的行动，这一变暖趋势可能会继续下去，将付出更高的代价。事实上，有关极端暴雨和热浪造成死亡和经济损失的新闻报道经常播出。
Climate scientists have warned that if we do not ________ ________ ________, this warming trend will probably continue and there will be a higher price to pay. In fact, news reports are frequently ________ about extreme rainstorms and heat waves ________ ________ and economic losses.

7 . 山里宁静的早晨，感受阳光洒落在你身上，呼吸着鲜花的芬芳。
On a quite morning in the mountains, feel the sun on your skin and _______ ________ the sweet scent of fresh flowers.