He has made another wonderful discovery， _____ of great importance to science.

A. which B. that

C. while D. when

A. it B. that

C. which D. what

A. that B. whom

C. when D. which

A. but B. moreover

C. furthermore D. so

A. It B. what

C. Just as D. As

A. the traffic is so B. is so the traffic

C. so the traffic is D. so is the traffic

A. so the people have B. the people have so

C. so have the people D. have the people so

A. Little they realize B. They little do realize

C. Little realize do they D. Little do they realize

A. that he saw B. had he seen

C. did he see D. that he had seen