已知，a、b互为相反数，c，d互为倒数，x的平方等于9，求：x2·（a+b+cd）+（a+b）2008+（-cd）2007的值？
解：原式=8。
_____ it was raining at that time, there were _____ a lot of people _____ to purchase the goods. [ ]
A. Though; but; waiting for
B. Even if; still; waiting
C. Although; as; looking forward
D. Even though; but; hoping
营养强化
