与胺碘酮延长心室肌APD作用机制有关的主要离子通道是（） A.钠通道 B.钙通道 C

短文填空 选择恰当的单词填空，每词限用一次。（有两个多余的选项）

answer, alone, oldest, start, until, ask, fortieth, own, teach, first, money, later

In Britain you are allowed to drive a car when you are seventeen. You have to get a special two-year driving license before you can ____. When you are learning, someone with a full license always has to be in the car with you because you aren’t allowed to drive the car on the road ____. You don’t have to go to a driving school——a friend can  ____ you. The person with you isn’t allowed to take the ___ for the lesson unless he’s got a teacher’s license.
Before you are allowed to have a full license, you have to take a driving test. You can take a test in your ____ car, but it has to be fit for the road. In the test you have to drive round for about half an hour and then ____ a few questions. If you don’t pass the test, you are allowed to take it again a few weeks ____ if you want to. In 1970 a woman passed her ____ test after 212 driving lessons. When you’ve passed your test, you don’t have to take it again, and you are allowed to go on driving as long as you like. Britain’s ____ driver was a man who drove in 1974 at the age of 100.
Before 1904 everyone was allowed to drive, even children. Then from 1904 car drivers had to have a license. But they didn’t have to take a test ____1935. On the early days of car driving, before 1878, cars weren’t allowed to go faster than four miles an hour, and someone had to lead the car with a red flag.