四、词汇运用。(共10小题;每小题1分,满分10分)
根据短文意思和首字母提示,写出一个完整正确的单词。
Over the years, movies and books have used tornadoes a lot in their stories. A tornado can be very d 1 . It can have wind speeds(速度) over 300 miles per hour, and t 2 over 25 miles before ending. Most tornadoes last for about 10 minutes, but larger ones usually last around 30 minutes. S 3 , tornadoes kill lots of people every year.
Scientists can't go inside tornadoes. That means tornadoes are very hard to study. As a
result, it is still u 4 how tornadoes form(形成) and die. To t 5 how strong a tornado is, scientists look at how much damage(损坏) it causes and s 6 the levels on the EF-Scale(分级) from EF0 to EF5. For example, if a tornado only damages trees, it will be at the level of EF0, while a tornado at the s 7 level of EF5 blows away buildings with wind speeds over 300 miles per hour.
S 8 tornadoes can happen very quickly, make sure you know what to do when facing
them. When you find y 9 meeting a tornado, calm down and try to find a safe place inside. Put your hands over the back of your head for p 10 . Also, stay away from windows and heavy things, or they may fall on you.
1.
dangerous
2.
travel
3.
Sadly
4.
uncertain
5.
tell
6.
show
7.
strongest
8.
Since
9.
yourself
10.
protection
解析：
翻译:
四、词汇运用。（共10小题；每小题1分，满分10分）
根据短文意思和首字母提示，写出一个完整正确的单词。
多年来，电影和书籍在它们的故事中大量使用龙卷风。龙卷风可能非常**危险**（dangerous）。它的风速可以超过每小时300英里，并且在结束前会**行进**（travel）超过25英里。大多数龙卷风持续约10分钟，但较大的龙卷风通常持续约30分钟。**令人遗憾的是**（Sadly），龙卷风每年导致很多人死亡。
科学家无法进入龙卷风内部。这意味着龙卷风很难被研究。因此，龙卷风是如何**形成**（form）和消散的仍然**未知**（unknown）。为了**判断**（tell）龙卷风的强度，科学家会观察它造成的破坏程度，并在EF分级（从EF0到EF5）上**确定**（set）等级。例如，如果一场龙卷风只损坏了树木，它的等级将是EF0，而一场处于**最高**（strongest）等级EF5的龙卷风会以超过每小时300英里的风速吹走建筑物。
**因为**（Since）龙卷风可能会非常突然地发生，所以确保你知道面对它们时该怎么做。当你发现**自己**（yourself）遇到龙卷风时，冷静下来并尽量在室内找到一个安全的地方。将你的手放在你的后脑勺上以**保护**（protection）自己。此外，远离窗户和重物，否则它们可能会砸到你。
