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Many people believe the glare from snow causes snow-blindness． Yet, dark glasses or not,they find themselves suffering from headaches and watering eyes, and even snow-blindness, when exposed to severa

A. Snow-Blindness and How to Overcome It
B. Natures Cure for Snow Blindness
C. Soldiers in the Snow
D. Snow Vision

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A. subject learning goals
B. general development goals
C. subject learning goals and general development goals
D. emotional goals

A. If it were not for
B. Had it not been for
C. Were it not for
D. If it has not been for

A. listen as much as possible
B. input regardless of studentsability
C. tolerate small errors in continuous speech
D. read more English materials