根据句意及首字母或汉语提示完成单词

（1）Have you seen the h stones at the Stonehenge?

（2）Twenty kilometres is not a long d if you drive there.

（3）After a short while, the clouds d and the sun came out.

（4）We shouldn't give up though we (面对)great challenges.

（5）The temperature in Harbin is very low in winter, usually (在……下面) zero.