if an answer choice distinguishes only between the use of that (evrythgn else remainig the same), make sure the verb is not a reporting one (such as indicate,claim contend etc-pg 212
MGMAT) then read both the choices with /without that. If the choice without that is clear in its meaning, go for it.
That usage can be tricky. Reporting verbs always take that also
if you have a noun referring to a feeling or an idea, than you're always going to need to use "that" if a description of that feeling or idea follows.
e.g.
the notion that his own family would vote against him
confidence that the economy will improve
(got the above examples from a forum)
these are the only 2 ones I know. there may be many.
But i seriosuly do not think any original GMAT Q would want us to decide only between that and lack of it.. there would sure be something else to fall upon.
preptime wrote:
Using hidden cameras that are triggered by motion, reclusive animals threatened by extinction are studied by biologists.
a. reclusive animals threatened by extinction are studied by biologists
b. reclusive animals, threatened by extinction, are studied bby biologists
c. reclusive animals are studied by bilogists that are threatened by extinction
d. biologists are studying reclusive animals that are threatened by extinction
e. biologists are studying reclusive animals threatened by extinction
oa is e. how do we diffrentiate between d and e?