题目内容：
Section BDirections：In this section，you will hear two passages．At the end of each passage,you will hear three or four questions．Both the passage and the questions will be spoken only once．After you hear a question，you must choose the best answer from the four choices marked A ，B ，C and D ．Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre．
Questions 9 to 11 are based on the passage you have just heard． A．It might increase mothers’mental distress．
B．It might increase the risk of infants’death．
C．It might affect mothers’health．
D．It might disturb infants’sleep．
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