1. Except for the gun, he did not look very dangerous. 除了那支手枪,他看上去并不令人感到危险。
2. Before I reach the door, I think I hear a voice say, money. Before I open the door I hear a voice and turn to see the man with a gun. 我同样也很生气,因为那是一个我从未见过、也从未伤害过的人在用枪指着我。
3. We may live to see the extinction of the whale. 人类或许能亲眼见到鲸的灭绝.
4. Whale is not a fish; it is a mammal. 鲸不是鱼类,它是一种哺乳动物。