The main cause of HIV / AIDS infection in China is drug abuse, ______ is very serious in Yunnan.
Many human activities also _______carbon gases, which will result in global warming.
Take good care of the resources or they will be ______ soon.
Eventually the government rebuilt the bridge _______the appeal and even pressure of the public.
The efforts of a government should be _______ in terms of the health and happiness of the people as well as the development of economy.
Victor apologized for ________ to inform me of the change in the plan.