According to Dr. Small, ______.
A．left-handers may start brain aging later than right-handers do
B．learning a foreign language does not help to keep our brain from getting old
C．doing crossword puzzles is a good way to keep us from memory loss
D．mental exercises plus healthy diet alone cannot keep us from brain aging
[A]long
[B]often
[C] soon
[D] much
Which of the following can best express the main idea of the passage？
[A] How to decide your reading speed..
[B] How to raise your reading speed.
[C] How to improve your reading skills.
[D] How to choose your reading materials.
We were swimming in the lake _____suddenly the storm started.
[A] when
[B]while
[C] until
[D]before
In regard of leadership competencies, the author suggests that people have ______.
A．believed in their existence
B．learned to apply them extensively
C．found it very difficult to acquire them
D．been unable to realize their importance
根据材料，回答97题
