Working as a fireman is demanding, which ________ responding to emergency situations, rescuing lives and protecting properties from all types of accidents. [ ]

If _____ carefully, the experiment will be successful.

because it solved a lot of problems between the two sides

To value time, one should live each day as if it _____ the last day of life.[ ]

couldn’t have done a better job for me, Jack!— Thank you, Mr. White. ______.