No sooner had we started the exam than it _____ to snow.
A. begin B. begins C. began D. is beginning
昨日习题答案：
The more you know about it, (D. the happier you are )
句意：你了解的越多，你就越高兴。
the +比较级 + the + 比较级（越… 就越…）happy 的比较级是happier。
