问题描述：
| Airplanes that used to take more than half a day to cross the Atlantic are now _____ to make it in several hours. |
| [ ] |
| A. faster than B. fast enough C. so fast D. faster |
考点提示：形容词,副词
最佳答案： | B |
Airplanes that used to take more than half a day to cross the Atlantic are now _____ to make it in s
Airplanes that used to take more than half a day to cross the Atlantic are now _____ to make it in s
最佳答案： 