Looking out into the distance from the vehicle can help 20 .
答案：(A) as well
語意「從車內往遠處看『也』有幫助」，as well（也）承接前面提到的座位選擇建議，表示這是另一個有幫助的方法；by far（遙遙領先地）、at least（至少）、after all（畢竟）都不合。
你背過 as well as（以及），所以看到句尾孤零零一個 as well 會不確定是不是少寫了什麼。單獨放在句尾的 as well 就等於 too，意思是「也」。要注意 as well 和 as well as 是兩回事：as well 放句尾表示「也」；as well as 後面一定要接名詞或動名詞。
看這句在整段的位置。前一句給了第一個建議 reserve seats where motion is felt the least（訂晃動最小的座位）；本句 Looking out into the distance from the vehicle can help ___ 是第二個建議；下一句 You can also take medicine 是第三個，還用了 also。同一串並列的建議，中間這一項用 as well 收尾，語氣完全吻合。
by far 用來加強比較級或最高級（by far the best 好太多了），本句沒有比較；at least（至少）帶有退一步的語氣，這裡沒有退讓；after all（畢竟、到頭來）用來補充理由或推翻預期，本句只是平鋪直敘再加一個方法。
as well（也，置於句尾）、A as well as B（A 以及 B，重點在 A）、by far（……得多，加強比較級與最高級）、at least（至少）、after all（畢竟；到頭來）、look out into the distance（望向遠方）。
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.