根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
We had been living our valley for sixteen months when we first realized the dangers that could exist. It was the year when the storms came early, before the calendar even hinted at winter, even before November was out. 71
Soon snow began to fall. Within a day it lay some 15 centimeters deep. It almost completely blocked our lane and made the streamside path slippery and dangerous. But on the neighboring heights the snow was much deeper and stayed for longer. Up there the wind blasted fiercely. Deeply in our valley we felt only sudden gusts of wind trees swayed but the branches held firm.
