Do you know the man _____ is sitting behind Nancy

_______ in London for so many years, you must learned a lot about English culture. [ ]

一What will the weather be like tomorrow一It be rainy ,cloudy or sunny．Who knows Even the weather report is not always right.

You___ buy a gift,but you can if youwant to.[ ]

The problem wasn’t difficult for him,was it ?-______. He should have been given a more difficult one.[ ]