如图，平行四边形ABCD的对角线AC、BD相交于点O，点E是CD的中点，△ABD的周长为16cm，则△DOE的周长是（　　）

阅读语段，按要求完成下面的1-3题。

①接受帮助是成长的便捷之路。②玉不琢，不成器。③________是金子，要经过开采、筛洗、熔炼、提纯，才能闪闪发光。④少年儿童的成长过程，就好像________、________的过程。⑤想成长得好，就要接受老师、家长、同伴的帮助。⑥哪些帮助你的人就想好的玉石工匠，用他们的智慧呵护你的成长之路。

Who was ____ (four) in the race?

在比例尺1：3000000的地图上，甲、乙两地的距离是8cm，一辆客车和一辆货车同时从两地相对开出，经过3小时相遇，客车每小时行44km，货车每小时行____km．

阅读短文，然后从方框中选出可以填入文中空白处的单词

could   born  got  look   invited   stood  began  ran  coming  fourteenth

Linda was  ____in Paris on December 24, 1988. It was her ____ birthday yesterday. She____ her friends to her party a few days ago. Her parents were busy yesterday. But they____ready for the party. The bought some fish, chicken, beef, vegetables, drinks and fruit .Everything was ready. They put all the food and drink on the table. And there was a nice birthday cake on the table, too. It was ten to eight and the party____.

The girl____ by the window and____out. She saw her friends ____. She ____to meet them at the door. His parents____hear the children say “Happy birthday to you!”outside.