先通读下面的短文，掌握其大意，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。所填单词在题后横线上必须完整写出。 (本大题共6分，每格0.5分)

The flying fox is not a fox at all. It is an extra large bat (蝙蝠) that has got a f   1    head, and that feeds on fruit i     2  of insects . Like all bats, flying foxes hang themselves by their toes when at rest, and t    3   in great groups when out flying. A group will l     4   in one place for y    5   . Sometimes several hundreds of them occupy (占据) a tree. As they return to the tree toward sunrise, they quarrel a    6    themselves and fight for the best places until long after daylight.

Flying foxes have b    7    once a year, giving birth to only one at a time. At first the mother has to c    8    the baby on her chest wherever she goes. Later she l    9    it hanging up, and brings back food for it to eat. Sometimes a baby bat falls down to the g    10   

and squeaks (尖叫) for help. Then the older ones swoop (俯冲) down and try to pick it up. If they f    11    to do so, it will die. Often hundreds of d    12    baby bats can be found lying on the ground at the foot of a tree.

女性，29岁，月经周期28天，末次月经时间为8月8日，下列哪项是错误的（）

A.排卵期约在8月22日

B.若受孕，孕卵着床时间约在8月25日

C.B超可能发现妊娠环的最早日期约在9月12日

D.B超开始观察到原始心管搏动的时间约在10月4日

E.预产期在第2年5月15日