7. Students in the early 1960's were taught that electons orbit the nucleus
of an atom and __ the path of this orbit was __ circular.
(a) the path of this orbit was
(b) the path of this orbit is
(c) the path of this orbit has been
(d) that the path of this orbit is
(e) that the path of the orbit was
Sentence: students...blah...were taught that X and that Y .
X & Y need to be in present tense cause they are facts even though the whole event happens in teh past.
Hope I am right...
"Do or do not, there is no try."