听一段材料,回答下面几个小题。
A.Those who often sent text messages. |
B.Those who suffered from heart disease. |
C.Those who did no physical exercise. |
D.whose who were unmarried |
A.They responded more slowly than usual. |
B.They sent more messages. |
C.They typed 10 percent faster on average. |
D.They edited more passages. |
A.Why chemical therapy works. |
B.Why marriage helps fight cant |
C.How unmarried people survive |
D.How cancer is detected after marriage. |
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