[填空题]The wind is blowing hard; please see that all the windows are fastened properly.

[简答题]I found it very hard finish all this work by myself.

[单项选择]Why is it hard to see most plankton
A. They are microscopic.
B. They move very quickly.
C. They are transparent.
D. They are rarely found near the surface.

[填空题]A(n) ______ wind blew hard across the open spaces. (ice)

[单项选择]

It’s often hard to see your mistakes as you’re making them. "Yikes! The kids are moving back in!" Thus goes the moan of the baby boom generation, around 2007. But letting the kids move back in is not the social error we’re talking about. Instead, the big mistake is the loudly voiced annoyance of the boomers. Most mistakenly decry the notion of the boomerang generation. For example, the authors of a recent book on the topic, Morn, Can 1 Move Back In With You report, "The parents of the 39 million twenty-somethings in the United States face the unprecedented challenge of their children’s prolonged adolescence. " The subtitle of the book is even more revealing: "A survival guide for parents of twenty-somethings. "
In order to fully appreciate the depth of the error being made here, we all need to step back a bit and look at the bigger picture. This epidemic of kids moving back home is first not "unprecedente
A. adult children move back and live at home.
B. parents indulge children in wherever they wish to live.
C. boomers nurse a grievance for home returning of young adults.
D. immature children result in many boomers suffering hardship.

[填空题]Such facts as rain, snow, storm and wind are all (phenomenon)（）of nature.

[单项选择]A. Because it’s hard to classify all of the varieties of animals.
B. Because their methods of biological research are inadequate.
C. Because they have difficulties in getting enough funding for saving the animals.
D. Because they are unwilling to make efforts to save every endangered species.

[单项选择]We were （） after all the hard work.
A. wear out
B. weary out
C. worn out
D. outworn