We learn from Paragraph 2 that the idea of evolution through natural selection ______.
A. had arisen long before the publication of Origin
B. was less influential than generally supposed
C. was shared by some of Darwin"s contemporaries
D. originated from geological evidences and fossil records
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You and some of your classmates decide to go for an outing to the Summer Palace during the
The bedroom is in a terrible mess; it______cleaned.
A. can"t have been
B. shouldn"t have been
C. mustn"t have been
D. wouldn"t have been
If we work hard, we can _______ whatever goal we set in our mind.
There are millions of blogs out there, with 40,000 new ones 1 ______ each day. Many blogs 2______ links, or 3______ words that, when clicked, carry readers to other Web pages. The interesting thing about blogs is one doesn’t have to wait for days, or even weeks, to get 4 ______; most blogs appear right away, typically within 5______ an hour, 6 ______ whether they are monitored 7 ______. It’s an interesting experience, getting 8 ______ about news stories, within hours, and sometimes even minutes, after the story breaks.