Do remember to be ________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.

It is not socially          for parents to leave children unattended at that age. 

Our     resources and fine policy can certainly provide foreigners with the advantages of     developing their business. 

Bamboo, which is a common plant in the south, is used ______ in buildings, food, furniture and so on. It is used to make clothes as well.

 He was left _____, with no one ____ after him.