1.____________（将领你们去参观我们的新车间）by the secretary.
　　2.You __________（我们期待你能组织贸易推广活动）this time.
　　3.If one or more electrons are removed,__________.（我们就说这个原子带正电荷。）
　　4.All kinds of measures __________（防止腐蚀）.
　　5. __________（众所周知）natural light is actually made up of many colors.

　　答案与解析：
　　1.You will be shown our new workshop
　　2.are expected to organize the trade publicity campaigns
　　3.the atom is said/believed/thought to be positively charged
　　4.are taken to prevent corrosion
　　5.It is well known that