根据汉语意思完成句子。 1.世界各地的人们都来参观上海世博会。 People from __ __ the world to visit the Shanghai World Expo. 2.目前我所需要做的就是好好学习。 __ __ need to do now is to study hard. 3.他当老师已经五年了。 He ___ __ a teacher for five years. 4.就是因为老师,我才喜欢上英语的。 __ __ because of Mrs. Wang __ I fall in love with English. 5.你能帮助他学数学吗? Can you ___ his math?