B7

The usual images of the North Pole are impressive ice sheets, but scenes from a webcam there reveal a different story. Meteorologists have reported that temperatures in early July were one to three degrees Celsius higher than the year’s average over most of the Arctic Ocean.
(степень сравнения)

 HIGH

B8

Thanks to rapidly melting ice, Santa Claus now has his own swimming pool. The North Pole is currently a lake, Canada.com reports.
(3-е лицо have-has)

 HAVE

B9

The lake is about a foot deep, consisting entirely of the melted ice itself. It shows a dramatic change is the Arctic climate.
(Participle I, “состоящая”, подходит по смысловому контексту)

 CONSIST

B10

In fact, a pool of melted water has formed at the North Pole every year now since 2002. The mythical home of Santa Claus has been officially flooded!
(present perfect, т.к. он начал формироваться и до сих пор формируется)

FORM