【单选题】Some parents don't allow their children to go online ________they are affected by something unhealthy. [ ]
【单选题】__________ , some students tend to develop a range of unhealthy habits .
A.
Parents don’t watch over them
B.
Not having watched over
C.
With no parents to watch over them
【简答题】Welcome to the World Expo 2010 Shanghai China. In order to protect the interests and rights of visitors and ensure a safe and orderly visit, the organizer of Expo 2010 has made these Terms and Conditi...
【单选题】Some children don’t like when their parents try to join their circle of friends.
【单选题】When you are working in machinery spaces, you should wear( )in order to protect your body.
【单选题】These samples have to be______in certain kind of chemical water in order to protect them.