It _______ for two hours now
A、rainsD
雨现在还在下，是持续到现在的动作，所以根据句意，用现在完成进行时比较好。
In 1995,an average of _______ of domestic travelers went on sightseeing in China.
According to Maslow,self-actualization need excludes _______
________ in thought, he almost ran into the car in front of him.
Which of the following is not an international visitor?
Neither English nor Chinese ________ difficult to learn.
