1£®Itishard____________(distinguish) onetwinfromtheother.

2£®____________(creative) andoriginalityaremoreimportantthantechnicalskill.

3£®Hehasbeenpromoted____________topofgettingapayraise.

4£®____________(hopeful), youwon’thaveanyproblemsafterreadingthis.

5£®Isthereanydoubt____________humanactivitiesareharmingourenvironment?

6£®Hearingthedogbarkingfiercely£¬awayfledthetwo____________(thief)£®

7£®IjustheardthebankwhereDoraworks____________(rob) byagunmanwearingamask.