1.We have investigated as _________ customers as possible in order to make sure of thepotential of the market. (2014-12)a. many b. much c. more d. most2. Reactions to the online management system were more positive ____ those to a paper-based version of the same system. (2014-06)a. which b. as c. than d. that3. In most cases, panel interviews were ____________ than those held by single interviewers. (2018-06)A. more reliable B. reliable C. most reliable D least reliable4. Recent studies show that employees who take vacation time and leave are ____________ than those who do not. (2017-12)A. efficient B. most efficient C. more efficient D. least efficient5. We believe that e-learning can be (effective) ___________ than traditional instructions in the future. (2017-06)6. Buying insurance through your business can be (cheap) __________ than buying an individual policy for yourself. （2016-12）7. It is said that advertising is the _____________________ (expensive) of all the promotional activities undertaken by business. (2014-12)