Scientists call Newton‘s idea _____ gravitation reaches throughout the universe the law of universal gravitation.

A. when B. which

C. that D. where

A. no of which B. none of which

C. some of that D. neither of which

A. whatever B. whenever

C. wherever D. whichever

A. that B. whom

C. which D. what

A. whatever B. how

C. no matter D. however

A. however B. whatever

C. whichever D. if only

A. did B. are

C. will D. don‘t

A. I knew B. I didn‘t know

C. I did know D. did I know