根据句意，用括号内所给单词的适当形式填空。
____ The maths problem is so difficult that few of the students can work it out_______ (easy).
____ Jim is a brave man. He always tells_________ (he) to calm down when he meets trouble.
____ Very few of people believe what the boy says because he is_________ (honest).
____ Everyone was very happy because of the famous writer’s _________ (arrive).
____ In the film, the soldiers were excited when they got their________(wife) letters.

阅读下列材料：

材料一：“上古之世，人民少而禽兽众，人民不胜禽兽虫蛇。”

﹣﹣《韩非子》

材料二：“在北京人遗址中，发现了大量木炭和几处较大的灰烬堆，还有在火中烧过的石块、兽骨和树子等。……”

﹣﹣历史教科书

材料三：“上古之世，……民多疾病。有圣人作，钻燧取火，以化腥臊，而民说之，使王天下，号之曰燧人氏。”

﹣﹣《韩非子》

阅读材料回答：

如图所示用弹簧测力计拉着木块向右加速运动的过程中（　　）