Helen is twenty years old, and her age is four times as much as Mary’s. When Helen’s age is twice as much as Mary’s, how old is Helen then

问答题If you count from one to two hundred, how many eight’s will you meet on the way

问答题我们愿意借此机会，对你们的帮助表示衷心的感谢。 ______________________________________________________________.

填空题capital

填空题Sometimes an unfairly-treated employee can use the computer to ________ on his employer.

填空题solve

填空题sight

问答题在怀特教授去过的所有地方中，他最喜欢桂林。 ______________________________, he likes Guilin best.

填空题stop using

填空题in nine years

填空题What is the difference between computer criminals and ordinary criminals