We've already sent out the invitation cards, but we don't know how many people____

A is stoping B stops

C will stop D shall stop

A have been tested B had been tested

C were tested D had tested

A didn't ever meet B have never met

C have ever met D never met

A to get B shall get

C will get D will have gotten 

A waited B was waiting

C has waiteD D had been waiting 

A will work B works

C will have worked D has worked

Aincrease fossil fuels

Bpurify the w~iter

Csolve social issues

Dprotect environment

AClean air

BClean water

CClean automobiles

DClean investment

AThe Environmental Protection Agency was founded

BCongressional Protection for water was passed

CThere are more demonstrations followed

DDenis Hayer published his Clean Energy Now

ACollege students

BPolicy makers

COrdinary people

DDenis Hayes