________ are industrial products. A: Major appliances B: Laundry detergents C: Life insurance policies D: Office supplies E: Legal services

The United States and Canada have agreed ______ in regard to the Great Lakes. A: to eliminate swimming entirely B: to limit boating and C: to limit phosphates and detergents D: to kill all algae

The United States and Canada have agreed ________in regard to the Great Lakes. A: to eliminate swimming entirely B: to limit boating and fishing C: to limit phosphates and detergents D: to kill all algae

which topics may be conducted in investigation reports？ A: popularity of different newspapers among middle-class readers B: prevalence of drug use among a section of people C: sample survey of public opinion on an important issue D: consumer preferences in the use of soaps and detergents