For "True/False/Not Given" and "Yes/No/Not Given" questions there are certain words that may change the meaning of a statement so you need to look out for these.
Can, may, must, could, would be, should be
All, both, not many, few, plenty, several, some, a large number, in some cases, in general
More than, less than, slightly more, relatively high, the same, the lowest
About, approximately, marginally, considerably, partially, dramatically, completely, highly, vastly, fully, evenly, clearly
Before, since, already, immediately, always
Prefer to, as well as, more than one way, more likely, are common
Possible, planned to, certain, little doubt, largely ignored, more important, only, tends to, limited, biased