—Mom，dad is smoking again!—Well，let him cut it ________ gradually since old habits die hard.

Running a company is not ______ a matter of hiring people—they also need to be trained.

Government officials cannot ________ accept bribes(受贿)，but in China quite a few take advantage of their power to break the rule .

What a mess！Tom，I have told you over and over again not to leave everything       .

 December 17, 2011 was a sad day for the North Koreans, ______ their top leader Kim Jung-ill passed away unexpectedly.