课后限时自测(十七)
Ⅰ.语法填空
The cold came a little bit __1__(early) this winter.The weather has been tough and unforgiving.
Beijing witnessed the earliest snowfall since the 1950s on Nov.3. Temperatures in many parts of China have hit record lows.Cold weather also brought heavy snowstorms to the US，Russia and Europe，__2__(cause) many deaths.
You may not think they are related in any possible way，__3__ scientists say that the extreme cold started in the North Pole，__4__ the sea ice is melting rapidly because of the burning of fossil fuels.This summer，the National Snow and Ice Data Center in the US announced that the sea ice coverage in the Arctic had reached its lowest level—with less than half of the coverage __5__ had four decades ago.
Large amounts of sea ice loss could change __6__ air circulates in the atmosphere.At the same time，__7__(melt)sea ice also releases more ocean water，which __8__(result)in increased water vapor in the atmosphere that can be transformed __9__ snow，according to National Geographic.
Also，the attack of the cold came quickly and without a break this year.“This left no time for the temperature
