20.A.by
B.without
C.except
D.beyond
解析:他们不愿意在新的境况中还没有尝试就被击败,故用without。
答案:B
Ⅴ.阅读表达
1.Facebook is a popular social networking site.Its_users_often_shareinformation through chatting and leaving words,which can create lots of problems if seen by a mischief(恶作剧) maker. So Facebook can also be a place of danger and harm.This makes it very necessary that you know some safety tips for using Facebook to protect yourself,your family and your friends.
2.Manage your privacy (隐私) settings.Most people share personal pictures and information on their Facebook,but it's very necessary to ensure that no outsider can view what you post on your account (账户).Facebook's original setting allows people who are not your friends to view your information.Make sure that you only allow your friends to see all the pictures and videos you post.All your other settings should also be set as “Friends only”.In this way,strangers and others whom you may not know can't view your Facebook.
3.Less Personal Information.Make sure that you don't fill up your personal information on the Facebook page.________ you add about yourself,the easier it's going to get for someone to use your information for wrong purposes.If your friends really need your contact (联系) information,then have them give you a call or send an email outside of Facebook.
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