1 . 据说现在近一半的澳大利亚公民要么自己出生于海外要么父母出生于海外。
______ ______ ______ ______ now nearly half of all Australian citizens were either born overseas or have parents who were born overseas.

2 . 将它和已知内容建立联系也很重要。
____________________________ it with what we already know.

3 . However, for those who are dangerously overweight, it is very important that they try to lose weight properly.
译文: 然而，对于那些体重严重超标的人来说, ________________

4 . ________ took the surgeon three hours to finish my mother's lung surgery. （用适当的词填空）