Ifyouarealoneandyoustumbleintoquicksand,youshould______.
A.str uggle
B.standstill
C.callforhelp
D.lieonyourback
正确答案:D[解析]见第四段前三句话,挣扎或站立会下陷得更深,正确的做法是张开手臂平躺在那里。

Ifyouarealoneandyoustumbleintoquicksand,youshould______.
A.str uggle
B.standstill
C.callforhelp
D.lieonyourback
正确答案:D上一篇 In Para. 3. the word “check” could best be replaced by which of the following?A. Control.
下一篇 For detecting quicksand the author recommends______. A. good eyesight B. fast thinkingC. t