单选题 Cold Snap Predicted
The citizens of Chicago are getting ready for a severe winter storm that (150) to hit the area overnight. The cold weather system, which has moved down from Canada, will bring freezing temperatures, increased moisture, and high winds to the city and surrounding regions. Forecasters are predicting that the city may receive more than 50 cm of snow in the next 24 hours. (151) this prediction proves correct, it will be the heaviest snowfall in the city for more than 50 years.
The city's emergency services are already on alert, and the fire department and city hospitals have called in extra staff. Residents are advised to stay indoors until the storm dies down, and to check on elderly or sick friends and relatives. By taking proper care of themselves and their loved ones, they may be able to (152) the demand for emergency services.