题目

在实验室里，同组的小科不慎将一支水银温度计打破，亮晶晶的水银像珍珠一样洒落在实验桌上，若此时你在实验室，你应该( ) A . 坚持把实验继续做下去，不要受到这些水银的干扰 B . 帮助小科赶紧用手把这些水银捡起来交给老师 C . 立即报告老师，请老师及时处理 D . 用纸盖上这些水银，下课再处理On July 1st, 1921, the red boat on South Lake in Jiaxing ________ the birth of the Communist Party of China,    which marked a new start for Chinese peopleA.witnessedB.gaveC.experiencedD.founded