It can 16 suddenly, progressing from a feeling of uneasiness to a cold sweat.
答案：(D) strike
strike 用於疾病、災難時是「突然發作、突然侵襲」，與 suddenly 及後面的 progressing from a feeling of uneasiness to a cold sweat 完全吻合；crash（碰撞）、flush（沖洗、臉紅）、burst（爆裂，須接 into／out）都不合。
答對率 31%。
strike 你記得的大概是「打、擊」（strike a ball）與「罷工」（go on strike），沒學到它在描述疾病、災難、天災時的用法——「突然發作、突然侵襲」。這一義在新聞英文與健康類文章裡出現頻率極高：An earthquake struck the area.（地震侵襲該地區）、A heart attack struck him without warning.（心臟病毫無預警地發作）。
主詞 It 指的是前一句的 motion sickness（動暈症），空格後緊接 suddenly，再接分詞構句 progressing from a feeling of uneasiness to a cold sweat（從一陣不適感發展成冒冷汗）——整句描述的正是「症狀突然發作、然後逐步惡化」的過程。疾病當主詞、後面接 suddenly，答案幾乎就鎖定在 strike。
crash 是「碰撞、墜毀」，用於車輛或系統；flush 是「沖水、臉紅」，flush 雖然與臉部有關，但指的是臉部發紅，不是疾病發作；burst 是「爆裂」，若要表達突然發生必須接介系詞（burst into tears、burst out laughing），不能像本句這樣單獨使用。
a disease／disaster strikes（疾病發作／災難侵襲）、be struck by lightning（被閃電擊中）、strike a balance（取得平衡）、go on strike（罷工）、motion sickness（動暈症）、break out in a cold sweat（冒冷汗）。
If you have ever been sick to your stomach on a rocking boat or a bumpy car ride, you know the discomfort of motion sickness. It can 16 suddenly, progressing from a feeling of uneasiness to a cold sweat. Soon, it can lead to dizziness, nausea, and vomiting.
Motion sickness occurs when the signals your brain receives from your eyes, ears, and body 17 . Your brain doesn't know whether you are stationary or moving when these parts send conflicting information: One part of your balance-sensing system detects that your body is moving, but the other parts 18 . Your brain's confused reaction makes you feel sick. You may experience the discomfort from the motion of cars, boats, or amusement park rides. You may also get sick from playing video games, or looking through a microscope.
You can take some 19 to help avoid the discomfort. If you are traveling, reserve seats where motion is felt the least, such as the front row of a car or forward cars of a train. Looking out into the distance from the vehicle can help 20 . You can also take medicine before your ride to avoid or reduce nausea and vomiting.