GRE Text Completion: Fundamental 24 Sets-GRE填空基础24套 - WR00RG0F566T92ZM!

The new vaccine is (i)____________ preventing certain forms of pneumonia and should, therefore, be more widely (ii)____________ in order to prevent outbreaks of the disease. A. effective in B. reconstituted C. unsuccessful in D. administered E. unverified for F. constrained