1) of 2) above 3) at 4) on 5) for 6) in 7) with last month the extent (a) arctic sea-ice was the lowest ever recorded (b) a january (during the satellite era), (c) temperatures several degrees (d) the long-term average. researchers hope to gather valuable new insights (e) the region where earth's climate is changing fastest.
2)for
3)with
4)above
5)in